Who should i rank up?

Stunnerk9

Hey everyone, i’m kind of stuck at a point where i have so many champs i’d like to take up but don’t have the rank up mats so i need to focus on one. I have a ton of options and anything that is r3 or above isn’t considered in this

Stunnerk9

essentially everything other than the top row, CAIW, and Dragon man is considered. I also have one 5* mutant AG