How to get lots of ISO-8?

I am level 44 and have completed 100% Story Quests Chapter 3. I have also completed a number of Event Quests both daily and monthly. Until recently I had only a few 4 star champs but now my 4 star roster has grown and I also have a couple of 5 star champs. But almost all of them are stuck at level 1 as I don't have enough ISO to upgrade them. I have upgraded 3-4 of them as much as possible and play with those in my AQs and AWs but I cannot start SQ Chapter 4 as it is getting difficult to complete any quest fully with the champs I have. How do I get a lots of ISO-8?

Comments

gage201205

Most players get isos from duping 4 stars which take time to gather

TheSquish671

Try act 4. It gives a lot of t3 and t4 basic iso

winterthur

Play arena, hit all milestones to get PHCs and hope RNG in your favour (duplicate champs gives lots of class isos).

unknown

This content has been removed.

IanMoone

For me i save 4* shards and open when i need iso

Nitro422

Daily question, do them

Iron_spider1

I was in the same condition as you but started doing act 4 and the iso is piling up now I don't have good champs to use them

IcsGrec

I get most of my iso from event quests and from duping 4stars. I've constantly got around 1.5k iso in my stash and I always have to sell them or they expire ..
You'll get to that point, especially when your 4star roster is very big and you dupe a champ from almost every crystal you open.
Also, Act 4 and Act 5 (if you have champs that are strong enough) give loads of iso.