Who Will Best Help Me Get Paragon?

I'm currently trying to get through Act 7 and struggling with the content - definitely a skill issue, but I'm also paralysed with indecision on which rank-ups might best help me advance, maybe filling a utility or specific boss counter gap I may have?
If there's nobody who would be of any particular help then that's cool and I just need to git gud; but if there is, who, and why?
These are my current R3s

These are my current R2s

And these are my R1s




I've got the resources to do 2 rank-ups now, and hopefully 1 or 2 more by the end of the current quest. I also have a mutant, skill, and 2x generic AGs, but not many sig stones
If there's nobody who would be of any particular help then that's cool and I just need to git gud; but if there is, who, and why?
These are my current R3s

These are my current R2s

And these are my R1s




I've got the resources to do 2 rank-ups now, and hopefully 1 or 2 more by the end of the current quest. I also have a mutant, skill, and 2x generic AGs, but not many sig stones
1
Comments
^^^ this guy gets it.
MCOCNOOB has helped me get through Act 6 and part way through Act 7. If I hadn't watched his videos, I'd still be cavalier.
With regards to champ to help with skill issue I'd say BWCV, she has immunities and also healing which can compensate. Also just keeping Heimdall on the team saves units !
Nimgod