ARENA lol. If you max milestones in arena you net yourself 20-30 PHC per 3 day round (and get hundreds of units with thousands on BC). The more PHC you open the more 4* you eventually get. I focused hard on maxing out my 2* roster so every time I get a PHC I am at least guaranteed 110 3* shards. Once I max out my 3*'s that will be 110 4* shards for every 3* I open...
As you can see once you get the ball rolling it only expands and gets bigger. Good luck.
oh PS.... if you don't have the roster yet, go for older 4* basic champs you do not already have (IE BP recently went for around 2.5 mill or less). That's how many expanded their roster early on. Once you get a decent roster you can grind for the top tier basic and featured champs as well.
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ARENA lol. If you max milestones in arena you net yourself 20-30 PHC per 3 day round (and get hundreds of units with thousands on BC). The more PHC you open the more 4* you eventually get. I focused hard on maxing out my 2* roster so every time I get a PHC I am at least guaranteed 110 3* shards. Once I max out my 3*'s that will be 110 4* shards for every 3* I open...
As you can see once you get the ball rolling it only expands and gets bigger. Good luck.
You only have three 4* left? Any 3* and below champs? Do you have enough champs to play AW for 4* shards?