Rank Up Dilemmas

Awsomediabrine

I have
4* black widow sig 40
4* Thor ragnorak sig 40(I think)
(15ish skill sig stones also)
4* Hawkeye(unawakened but I have a skill awakening gem)
5* sentinel unduped
5* iron Man infinity war unduped
4*sentinel duped
Who should I rank up? Please comment why too. If I should rank up 4* sentinel just comment.( No room for poll option)

winterthur

If you don't have a power control champ, rank up Hawkeye (keep the awakening gem at the moment), else go for Sentinel.

Sentinel has double immunities and is good for AQ and also AWD. Rank both if you have the resource, else do the 4* first.