I've been holding off ranking up for a while because I just can't quite figure out who to take up. I'm recently Thronebreaker, do a single pass of TB difficulty in EQ and what I can in AQ, looking to proceed with Act 7 & 8 - so any champs who can particularly help me with that I'd like to prioritise. Current R3s are marked in red, R2s in orange.



I only have resources for these 3 classes, but my other R3 champs are BWCV, Wiccan, Immortal Abomination, and Nimrod.
I also have a Skill and a Mutant awakening gem for 6*, but only enough sig stones to get champs to like Sig 70 or so, so cannot even close to max sig anyone.
Advice much appreciated please