Best champ to use 4* generic Awakening Gem on ??

NJPIZZA

Best champ to use 4* generic Awakening Gem on ??
Need a hand here

Blitzkilla420

Hulk is insane when he's duped. Hype becomes even better when he's duped. Gp duped becomes unkillable by an s3 (unless it has a dot debuff after) and gr can place an extra judgement and increase his attack from that (read gr abilities). Hela I wouldn't waste it on her.

So really it depends what you need.
Hope this gives you the best idea to use it on