Which 6* to take to R3 next

ramsey8582

I’m working through act 7 right now. My current 6* R3 roster is Kitty, NF, Apoc, Corvus, CGR, HT and Warlock. I also have Herc at R4. Who will help me the most with Act 7 content?

ZAHIDMALIK1588

Nimrod or KP. I'd personally go with KP