Mutant and Cosmic rank up

Who should I rank up? 4* to r4 or r5, 5* to r2 or r3

Comments

Emma is the best option

Emma is the best option.

But 4* Domino is not a bad option.

I wanted to vote domino, then I saw she is 4*. so 5* emma is the future...

I upgraded my emma, just got her 1 day ago. Thanks guys