Yesterday i finished 6.2 100%.

Now i wanna get my hands on the other chapters 3 and 4. Can u guys please tell me which champs are necessary or will make fights easier for 100% exploration?
Got a mystic 4 to 5 gem and 3 T5B for 2 new R5 5 Stars.
Can u recommend some useful champs that are r5 worthy for the rest of Act 6?
Heres my roster so far. some r1s are missing, nevermind





also have sunspot, gulli 2099 and mojo but they are unlevelled
tia helpful members