Summoners, the Necrosword Crystals (the crystals in the Knull Cavalier Preview Bundle) currently have a higher than intended drop rate of 6-Star Champions.

We will be leaving the crystals as is for the time being, but will be correcting the drop rates before Knull receives his official release on October 28th. To ensure that this does not affect anybody that purchased this preview bundle, we will be auto-opening these crystals before that date, but this means you will not see what you received. To avoid any confusion, please open your crystals yourself ASAP.

We will be leaving the crystals as is for the time being, but will be correcting the drop rates before Knull receives his official release on October 28th. To ensure that this does not affect anybody that purchased this preview bundle, we will be auto-opening these crystals before that date, but this means you will not see what you received. To avoid any confusion, please open your crystals yourself ASAP.

# A case study and analysis of arena grind rewards

Since there are probably a lot of people sitting at home with a lot more time to grind arena, I thought this would be a timely analysis to do now. I'm just going to toss out some numbers here, and then work my way back to them, because this is going to be a long discussion. Here they are:

5,417,277 gold 7411 units per month

42322 gold and 58 units per hour

1830 gold and 2.5 units per round

There has been a lot of discussion in the past year or two about gold being a key resource shortage in the game. This thread is not about that discussion, at least not directly. Whether there is or is not a gold shortage depends greatly on what your progress level is and how you play the game. But there's an additional wrinkle that is increasingly being suggested: that the gold shortage is different because it is

I had to start somewhere, so the logical place to start is with me. As we'll see, there will still be a useful way to extrapolate this to other players. I'm almost certainly not a typical arena grinder: the fact that I can consistently place in the top 10% in any, or if I try every arena says that. But still, I decided to actually do all the arenas to see what I came up with. I used to grind way more, now I generally grind way less, so I wanted to see solid numbers when I actually did all the milestones deliberately. And I do mean all of them.

The bottom line: this is how many rounds I did in each arena, during the normal weekday event, points scored, and rank placement.

5* featured: 121 rounds; 16,409,861 points [1-10%]

4* featured: 61 rounds; 4,006,761 points [1-10%]

4* basic: 55 rounds; 1,514,133 points [11-25%]

3* featured: 40 rounds; 656,206 points [11-30%]

Summoner trials: 6 rounds; 25482 points [did not reach all milestones]

Yeah, I got lazy on the last one. We can estimate that one without too much difficulty: at about 6k average per round, it would have taken about 44 rounds to reach the last milestone. Let's pretend I did that. If I did that would have been 321 rounds in three days. I average 23 arena rounds per hour normally, and 25 if I really push it. At 23 rounds/hour that is just under fourteen hours, which agrees with my estimate for time spent on grinding during this period. That's four hours forty minutes per day on average. Way more than the average player, but not an extreme level of grinding for an arena grinder. What do I get for that effort?

First of all, I get all the milestones. Here they are in total (I've dropped the arena boosts as irrelevant here):

5* featured: 135 units, 19500 BC, 38000 gold, 9 PHC, 1500 PHC frag

4* featured: 135 units, 16750 BC 30750 gold, 17400 PHC frag

4* basic: 135 units, 13500 BC, 23000 gold, 14800 PHC frag

3* featured: 65 units, 9000 BC, 17500 gold, 9000 PHC frag

Summoner trials: 65 units, 6600 BC, 10600 gold, 4500 PHC frag

Total: 535 units 65350 BC, 119850 gold, 32.6 PHC (equivalent)

Weekly (two runs): 1070 units, 130700 BC, 239700 gold, 65.2 PHC

On top of that, I also did some Sunday grinding, although much less:

Crystal trove: 47 rounds; 3940404 points [11-30%]

Crystal cornucopia: 29 rounds, 1587568 points [1-5%]

Crystal splash: 22 rounds, 330099 points [1-50%]

The total milestones here come to 59000 gold combined, plus a bunch of crystals I'm going to ignore for now.

That means an entire week of this level of grinding would generate 1070 units, 130700 BC, and 298700 gold.

But wait: this doesn't include gold and BC you earn from the actual grind itself. You get gold and BC in every round. This does vary somewhat depending on what you use in the arena (sometimes) but given the amount you earn per victory, plus the bonus (assuming you win all three), minus the entry costs, this is about what I earn per round in those arenas using my typical teams:

5* featured: 480 BC, 450 gold

4* featured: 420 BC, 350 gold (375 BC 200 gold with 4*)

4* basic: 375 BC, 200 gold

3* featured: 345 BC, 250 gold

Summoner trials: 330 BC, 190 gold

Crystal trove: 420 BC, 150 gold

Crystal cornucopia: 420 BC, 150 gold

Crystal splash: 345 BC, 150 gold

I can tally up all the rounds I grinded and calculate the total BC and gold I earned actually doing all those rounds, separate from the milestone rewards. I get:

5* featured: 58080 BC, 54450 gold

4* featured: 25620 BC, 21350 gold

4* basic: 20625 BC, 11000 gold

3* featured: 13800 BC, 10000 gold

Summoner trials: 14190 BC, 8170 gold

Crystal trove: 19740 BC, 7050 gold

Crystal cornucopia: 12180 BC, 4350 gold

Crystal splash: 7590 BC, 3300 gold

Total for week (normal x 2 + sunday) = 304140 BC, 224640 gold

When I add that to the milestones, I get this:

Full week total: 434840 BC, 523340 gold, 1070 units

Monthly total (four weeks): 1739360 BC, 2093360 gold, 4280 units

One last thing. Based on my analysis of average return on arena crystals I can convert those battlechips into an average amount of gold and units using the ratio 1,000,000 BC = 1,911,000 gold and 1800 units. I get about 3323917 gold and 3131 units. So the grand total for four weeks (~one month) of grinding at this rate is:

5,417,277 gold 7411 units.

That's

Now, let's say we ignore milestone rewards entirely and just look at the gold return per round in all the arenas. Since I can estimate the gold return per battlechip as about 1.9 gold per BC, I can refactor all the net earnings per round for all the arena rounds expressed in gold:

5* featured: 1362 gold

4* featured: 1148 gold (913 gold with 4*)

4* basic: 913 gold

3* featured: 906 gold

Summoner trials: 817 gold

Crystal trove: 948 gold

Crystal cornucopia: 948 gold

Crystal splash: 806 gold

1830 gold per round isn't sustainable because a significant fraction comes from milestone rewards, and they eventually run out. So the long term best case earning rate is closer to 1200 gold per round (some blended average of the 4* basic, 4* featured, and 5* featured arenas). So the long term earning rate per hour after all milestones everywhere are exhausted are about 27,600 gold per hour, if you expend more than about five hours per day on average.

I'm sure someone by now is saying that there's no way the "average player" can grind this much arena, and that's of course true. The average player can't. But the average player can't *use* this much gold either. To put this into perspective, the Map 7x5 gold donation level is (I believe) about 440k per AQ week. That's 1.76 million gold in a month, more or less. The gold to rank up a 5* from rank 1 to rank 5 using class-correct ISO is about 2.5 million. To meet that donation level and rank two 5* champs a month from rank 1 to rank 5 would require sustaining about 6.8 million gold per month. The grind above comes pretty close to that, and that's before we count all the other rewards that are hidden amounts of gold, like the PHC crystals or the shard crystals, all of which generate champion dups and thus ISO, which can be sold for gold. Or for that matter gold earned anywhere else in the game. And it doesn't count the 7400 units a month this level of effort generates, which even if you use a fraction of on things like Cavalier crystals will also generate tons of ISO through champion dups. This also assumes anyone believes Kabam releases two rank 5-worthy champs a month, every month, that you would even want to rank up, and that you never rank up 6* champs (which take far less gold to get to rank 2 than 5* champs take to get to rank 5).

Does this mean anything for players who are not top tier players or not high-effort arena grinders? Yes, it does. I want to repeat the average return on arena grinding here:

1830 gold and 2.5 units

42322 gold and 58 units

This, or something like it, is achievable for

You need a million gold? It'll take about 24 hours in the arena. You need 15,000 units for July 4? 259 hours or so in the next three months (under three hours a day). Depending on specific circumstance, the numbers could be a third higher or lower, but in that general ballpark.

That's how much stuff is in there. It is just disguised in iterations and conversions.

I should emphasize that this is not the final word on whether there is a "gold problem" in the game. That's a much more complex and situational question. But it does provide a quantitative context to one extreme version of the question: is it possible to grind enough gold to satisfy the needs of the highest tier players without spending money. And the answer to that question is apparently yes: it is. Five hours a day gets you mostly there, and not only does it generate a ton of gold, in some sense it costs

This is a lot of calculations, and I did all of this fairly quickly this weekend in between the only acceptable Corona hand holding work going on now (IT people, you know what I'm talking about). So if anyone has questions or corrections, let me know. I *think* I've double checked everything properly, but there's always a possibility a two got accidentally not carried somewhere.

5,417,277 gold 7411 units per month

42322 gold and 58 units per hour

1830 gold and 2.5 units per round

There has been a lot of discussion in the past year or two about gold being a key resource shortage in the game. This thread is not about that discussion, at least not directly. Whether there is or is not a gold shortage depends greatly on what your progress level is and how you play the game. But there's an additional wrinkle that is increasingly being suggested: that the gold shortage is different because it is

*insurmountable*by*any reasonable level of play*without spending. In other words, if you play at a high enough level there's no way to earn enough gold to effectively do all the things you need to do that require gold, like rank up champs or fulfilling AQ donations for high maps. That notion seemed worthy of a more quantitative analysis. My gut instinct says that's not true, but I don't believe anyone has done the numbers to figure out exactly how much, or how little, gold you can earn in the arena. I decided to do that, and since the two are significantly linked I decided to figure out exactly how much gold and units an arena grinder can obtain.I had to start somewhere, so the logical place to start is with me. As we'll see, there will still be a useful way to extrapolate this to other players. I'm almost certainly not a typical arena grinder: the fact that I can consistently place in the top 10% in any, or if I try every arena says that. But still, I decided to actually do all the arenas to see what I came up with. I used to grind way more, now I generally grind way less, so I wanted to see solid numbers when I actually did all the milestones deliberately. And I do mean all of them.

The bottom line: this is how many rounds I did in each arena, during the normal weekday event, points scored, and rank placement.

5* featured: 121 rounds; 16,409,861 points [1-10%]

4* featured: 61 rounds; 4,006,761 points [1-10%]

4* basic: 55 rounds; 1,514,133 points [11-25%]

3* featured: 40 rounds; 656,206 points [11-30%]

Summoner trials: 6 rounds; 25482 points [did not reach all milestones]

Yeah, I got lazy on the last one. We can estimate that one without too much difficulty: at about 6k average per round, it would have taken about 44 rounds to reach the last milestone. Let's pretend I did that. If I did that would have been 321 rounds in three days. I average 23 arena rounds per hour normally, and 25 if I really push it. At 23 rounds/hour that is just under fourteen hours, which agrees with my estimate for time spent on grinding during this period. That's four hours forty minutes per day on average. Way more than the average player, but not an extreme level of grinding for an arena grinder. What do I get for that effort?

First of all, I get all the milestones. Here they are in total (I've dropped the arena boosts as irrelevant here):

5* featured: 135 units, 19500 BC, 38000 gold, 9 PHC, 1500 PHC frag

4* featured: 135 units, 16750 BC 30750 gold, 17400 PHC frag

4* basic: 135 units, 13500 BC, 23000 gold, 14800 PHC frag

3* featured: 65 units, 9000 BC, 17500 gold, 9000 PHC frag

Summoner trials: 65 units, 6600 BC, 10600 gold, 4500 PHC frag

Total: 535 units 65350 BC, 119850 gold, 32.6 PHC (equivalent)

Weekly (two runs): 1070 units, 130700 BC, 239700 gold, 65.2 PHC

On top of that, I also did some Sunday grinding, although much less:

Crystal trove: 47 rounds; 3940404 points [11-30%]

Crystal cornucopia: 29 rounds, 1587568 points [1-5%]

Crystal splash: 22 rounds, 330099 points [1-50%]

The total milestones here come to 59000 gold combined, plus a bunch of crystals I'm going to ignore for now.

That means an entire week of this level of grinding would generate 1070 units, 130700 BC, and 298700 gold.

But wait: this doesn't include gold and BC you earn from the actual grind itself. You get gold and BC in every round. This does vary somewhat depending on what you use in the arena (sometimes) but given the amount you earn per victory, plus the bonus (assuming you win all three), minus the entry costs, this is about what I earn per round in those arenas using my typical teams:

5* featured: 480 BC, 450 gold

4* featured: 420 BC, 350 gold (375 BC 200 gold with 4*)

4* basic: 375 BC, 200 gold

3* featured: 345 BC, 250 gold

Summoner trials: 330 BC, 190 gold

Crystal trove: 420 BC, 150 gold

Crystal cornucopia: 420 BC, 150 gold

Crystal splash: 345 BC, 150 gold

I can tally up all the rounds I grinded and calculate the total BC and gold I earned actually doing all those rounds, separate from the milestone rewards. I get:

5* featured: 58080 BC, 54450 gold

4* featured: 25620 BC, 21350 gold

4* basic: 20625 BC, 11000 gold

3* featured: 13800 BC, 10000 gold

Summoner trials: 14190 BC, 8170 gold

Crystal trove: 19740 BC, 7050 gold

Crystal cornucopia: 12180 BC, 4350 gold

Crystal splash: 7590 BC, 3300 gold

Total for week (normal x 2 + sunday) = 304140 BC, 224640 gold

When I add that to the milestones, I get this:

Full week total: 434840 BC, 523340 gold, 1070 units

Monthly total (four weeks): 1739360 BC, 2093360 gold, 4280 units

One last thing. Based on my analysis of average return on arena crystals I can convert those battlechips into an average amount of gold and units using the ratio 1,000,000 BC = 1,911,000 gold and 1800 units. I get about 3323917 gold and 3131 units. So the grand total for four weeks (~one month) of grinding at this rate is:

5,417,277 gold 7411 units.

That's

*a lot*of gold and units. And the total time spent to do this is less than five hours a day. In fact, it is about 32 hours per week, or a little more than four and a half hours per day. This means my average rate of return in grinding all of this is about 42322 gold per hour (and about 58 units per hour). Or if you prefer, it is about 1830 gold*per round*(also almost exactly 2.5 units per round).Now, let's say we ignore milestone rewards entirely and just look at the gold return per round in all the arenas. Since I can estimate the gold return per battlechip as about 1.9 gold per BC, I can refactor all the net earnings per round for all the arena rounds expressed in gold:

5* featured: 1362 gold

4* featured: 1148 gold (913 gold with 4*)

4* basic: 913 gold

3* featured: 906 gold

Summoner trials: 817 gold

Crystal trove: 948 gold

Crystal cornucopia: 948 gold

Crystal splash: 806 gold

1830 gold per round isn't sustainable because a significant fraction comes from milestone rewards, and they eventually run out. So the long term best case earning rate is closer to 1200 gold per round (some blended average of the 4* basic, 4* featured, and 5* featured arenas). So the long term earning rate per hour after all milestones everywhere are exhausted are about 27,600 gold per hour, if you expend more than about five hours per day on average.

I'm sure someone by now is saying that there's no way the "average player" can grind this much arena, and that's of course true. The average player can't. But the average player can't *use* this much gold either. To put this into perspective, the Map 7x5 gold donation level is (I believe) about 440k per AQ week. That's 1.76 million gold in a month, more or less. The gold to rank up a 5* from rank 1 to rank 5 using class-correct ISO is about 2.5 million. To meet that donation level and rank two 5* champs a month from rank 1 to rank 5 would require sustaining about 6.8 million gold per month. The grind above comes pretty close to that, and that's before we count all the other rewards that are hidden amounts of gold, like the PHC crystals or the shard crystals, all of which generate champion dups and thus ISO, which can be sold for gold. Or for that matter gold earned anywhere else in the game. And it doesn't count the 7400 units a month this level of effort generates, which even if you use a fraction of on things like Cavalier crystals will also generate tons of ISO through champion dups. This also assumes anyone believes Kabam releases two rank 5-worthy champs a month, every month, that you would even want to rank up, and that you never rank up 6* champs (which take far less gold to get to rank 2 than 5* champs take to get to rank 5).

Does this mean anything for players who are not top tier players or not high-effort arena grinders? Yes, it does. I want to repeat the average return on arena grinding here:

1830 gold and 2.5 units

*per round*42322 gold and 58 units

*per hour*This, or something like it, is achievable for

*everyone*, especially for players that do not grind enough arena to gather all the milestones. As long as unclaimed milestones exist, grinding has a higher return than just the base earnings per defeat. The stronger your roster the faster you earn points and the faster you earn milestones, but as long as your champs are reasonably ranked up more than half of that return comes just from defeating things in the arena. You're going to get well over half of that rate even if you never claim a single milestone.You need a million gold? It'll take about 24 hours in the arena. You need 15,000 units for July 4? 259 hours or so in the next three months (under three hours a day). Depending on specific circumstance, the numbers could be a third higher or lower, but in that general ballpark.

That's how much stuff is in there. It is just disguised in iterations and conversions.

I should emphasize that this is not the final word on whether there is a "gold problem" in the game. That's a much more complex and situational question. But it does provide a quantitative context to one extreme version of the question: is it possible to grind enough gold to satisfy the needs of the highest tier players without spending money. And the answer to that question is apparently yes: it is. Five hours a day gets you mostly there, and not only does it generate a ton of gold, in some sense it costs

*negative money*as it generates an almost ludicrous amount of units.This is a lot of calculations, and I did all of this fairly quickly this weekend in between the only acceptable Corona hand holding work going on now (IT people, you know what I'm talking about). So if anyone has questions or corrections, let me know. I *think* I've double checked everything properly, but there's always a possibility a two got accidentally not carried somewhere.

47

## Comments

399★★4,293★★★★★My satisfaction is immeasurable, and my day is brightened.

1,960★★★★13,274GuardianA relatively casual player could conceivably do 300 hours of arena in an entire year, which could be close to or more than the amount of units you'd need for the Black Friday deals, avoiding having to spend cash. If you take the long term perspective, rewards can add up over time to very high amounts.

I *could* sustain these numbers and the rewards are tempting, but I'd burn out at this level so even I don't do this. But I probably achieve at least half of this on average even just cruising along at a pace I find reasonable, and half these numbers is still plenty of rewards for what amounts to two or three hours a day of grinding.

You could say this is another in my pseudo-series on "play on your own terms." You can get a thousand glory a week or more playing completely solo if you want to. And you can earn a ton of units and a ton of gold grinding arena even if the best you can do is an hour or two a day. More is more, but less isn't worthless.

Use this information to play on your own terms.

Still, I wonder how many would guess that five hours of grinding a day, focused on acquiring all the milestones in the arena, generate approximately

one hundred thousand unitsin a year.5,522★★★★★Dr. Zola

13,274Guardian676★★The thing is you don’t even need to grind arenas that hard to keep a constant flow of gold, units and battle chips.

And you’ve only showed from arena. Imagine including from other game modes.

There isn’t a gold problem in this game.

269★★I generally grind the 4* basic up til 1.5 mil cos there seems to be more easily attainable milestones. But I never seriously did any math before.

1,479★★★★I would argue that spending 24 hours of grinding arena to rank 1 champ is completely ridiculous and we should have other viable ways of obtaining gold other than arena.

Look I get it, arena grinders don't understand "normal" players. A guy like me doesn't have time to dump 2 hours a day into arena grinding. 2 hours may not seem like a lot, but add that to AQ, AW, officer duties, questing, ect and now I'm up to 5 to 6 hours a day.

That's a part time job, not a hobby.

55★194★★451★★★451★★★731★★★★“For just 4 hours per day you too can have these beyond god-tier amounts of resources! Forget yo wife. Forget yo kids. Forget yo job. Forget your other mcoc commitments! Arena is the game mode of the future!”

I love it!

451★★★676★★Never had a gold problem since the first gold event that kabam did.

But like I always say.....”there’s no gold in the forums” 😁.

13,274GuardianIn fact, a player can get to four or five hours of arena grind a day without spending *any* time playing the game during the work day. Can you say that about running map 6? Or even map 5?

Only players playing at the very top of the progress ladder could possibly need this much gold in a sustained fashion. I don’t think it is asking a lot that those top tier players have to do way more than the average player when it comes to earning things like gold. But that’s just my opinion, the point is the gold is *there* and now we have more precise numbers on how hard it is to get it.

I wanted to dismiss the idea that it is impossible to earn this much gold, or that it would take grinding nonstop all day all night. It doesn’t. And I’m sure I’m not alone in saying it is much easier and far less stressful to grind five hours a day than live in a map 7 alliance or do competitive war every season.

13,274GuardianI’m honestly not trying to sell arena. I think it sells itself. But I think the biggest selling point on the arena If I were to try to sell it is if you want to keep your job and wife and kids you can do less arena some days and more other days and still get a large fraction of these rewards. There’s a version of this that only costs an hour a day. Is there a version of map 7 you can do for an hour a day for partial rewards?

The point to grinding out all these numbers is to give the data to players so they can make their own decisions. I believe in informed choice, and sometimes the information necessary to make that choice is hidden behind a lot of math. I’m willing to do the math so you don’t have to.

13,274GuardianMy point here is not that grinding is easier, but rather that the reverse isn't obviously true either. For every person that describes hours of arena as a second job, there is another person that would describe Map 5-6-7 the same way. What made it seem more obvious that arena grinding was a larger burden was the amounts of time tossed around, that arena grinding required literally the same amount of time as a full time job. Here, at least if you're going to make the argument that arena is a much larger burden than, say, high map AQ at least we have the numbers to compare. The five hours a day I mention above compares to the catalyst earning capability of a high tier high prestige player doing 7x5. Many of the players not playing the game "as a second job" wouldn't be doing that either, and their gold requirements would be correspondingly lower. An hour a day is thirty hours a month, more than a million gold in that month. For probably most players, that's more gold than they spend on average.

You say that adding two hours of arena to what you do already would get you to five or six hours a day, which is "a part time job." But that means the everything else is already three to four hours a day. Why isn't that already a part time job? More importantly why should the game treat those two hours as the problem and not the other four? If you're going to make the case that the game should offer other options besides the arena to get gold, then why isn't it justified for other players to ask that the game should offer other options besides AQ to get those resources? Something that is easier and takes less time? Suppose we did both: somehow made it easier and less time consuming to get the resources now in the arena, and also easier and quicker to get the resources gated in AQ? Would that make the game better? Or would it make the game boring?

The calculations don't show that there's no gold problem. It simply shows that the gold problem has a similar magnitude to the catalyst problem and the champion crystal problem. Everyone is short of something, and the players short of gold don't have a larger problem than the players short of catalysts or champion crystals.

Or to put it more bluntly, arena grinders are no more "abnormal" players than map 6 players or Cavalier players. The game isn't divided into normal players and arena grinders. Whether you grind arena or not is a choice. Whether you decide to participate in an AQ focused alliance or an AW focused alliance is a choice. None of them are any more reasonable or normal than the others.

1,587★★★★★I used to hit arena hard, back in the day. Now, even if I had the time (which I don't), just the thought of grinding for hours makes me want to do almost anything else

As I always say, more power to those who do. People who grind deserve all they get

84★80★118★Woah theres no way in hell im reading all that. Ill just drop my insightful and be on my way

371★★309★★479★★1,629★★★★Same here. The data is geared towards Endgame players with a sizeable roster. I'm actually looking for an Arena Grind table with the ff. data:

- Battlechips earn per milestone per arena

- Units earn per milestone per arena

- Gold earn per milestone per arena

- Milestone rewards

- Ideal team ranking and/or infinite streak (to minimize grind time) per arena

I can't compile them yet since I'm only 2 months into the game. Lol. I can only do infinite streak on Basic 4* since as of the moment I only have 6 5* champs but I'm starting to realize the importance of Arena grind in this game.

270★★Now get back too grinding 🤙

2,951★★★★★Seriously though, good work. I would say that with the meta shifting into 5*+ far earlier relatively new players wouldn’t be able to hit the 4* arenas so well.

To take me as an example, I’ve got 21 6*, 95 (ish) 5*, of whom 12 are R5, 10 or so R4. I can hit 10% if I actually make sure I’m playing. The 4* arenas, however, unless I’m actually hitting them every 2 hours on refresh I struggle as I’ve only actually got 8 5/50 and about 25 champs at 2/20+ because I transitioned into 5* so quickly and it’s just not worth putting T1A resources into 4* over 5* and I prefer the fast return on 3* over 4*

13,274GuardianThe other reason is that I think it is more important to explain the thought process, because I think it is ultimately more valuable if people understand how I thought about the problem so they can do it themselves. Different people could take my basic methodology but adapt it to different perspectives or entirely different parts of the game. Teach a man to fish, blah blah.

But, here's a summary of the important numbers, with those caveats aside:

Using the teams *I* use, this is what I earn per round of arena, for the different arenas (factors in the cost):

5* featured: 480 BC, 450 gold

4* featured: 420 BC, 350 gold (375 BC 200 gold with 4*)

4* basic: 375 BC, 200 gold

3* featured: 345 BC, 250 gold

Summoner trials: 330 BC, 190 gold

Crystal trove: 420 BC, 150 gold

Crystal cornucopia: 420 BC, 150 gold

Crystal splash: 345 BC, 150 gold

If you grab all the milestones for the normal weekday (non-Sunday) arenas, this is what you can get (this is just the milestones, not any rewards you get per round):

5* featured: 135 units, 19500 BC, 38000 gold, 9 PHC, 1500 PHC frag

4* featured: 135 units, 16750 BC 30750 gold, 17400 PHC frag

4* basic: 135 units, 13500 BC, 23000 gold, 14800 PHC frag

3* featured: 65 units, 9000 BC, 17500 gold, 9000 PHC frag

Summoner trials: 65 units, 6600 BC, 10600 gold, 4500 PHC frag

And finally, from my arena crystal thread, this is about what you get on average when you convert one million BC into arena crystals (either one):

1,000,000 BC = 1,911,000 gold and 1800 units.