Options
Lack of ISOs

Every time i open a 4* or 5*, i'm getting new champs. And now i dont have any ISOs to level up my champs. Any other ways to get more ISOs? Now i'm exploring Act 4 for it, but they are not sufficient.
0
Comments
As to the lack of ISO, every player has to go through that because the balance between getting new champs and getting ISO resources to rank them up is strongly related to the number of different champs you have (of a particular star tier). If there's 150 different champs, more or less, and you have 20 different champs (of a particular star tier) then 87% of the crystals you open will be a new champ and 13% will be ISO and gold (and shards) from duplication. That ratio means you will be expanding your roster much faster than collecting the ISO needed to rank stuff up. But over time every new champ you get increases the odds of getting ISO and decreases the odds of getting new champs. When you have 60 different champs the odds of getting new champs is 60% and the odds of getting ISO is 40%. When you have 100 different champs the odds of getting new champs is only 33% and the odds of getting ISO are 67%. As those odds shift, the situation tends to shift from having lots of champs you want to rank up but no ISO to rank them all up, to chasing just a few champs you really want but having way more ISO than what you need for the fewer champs you actually want to rank up.
There aren't a lot of ways around this in the game.