Who to use a 6* awakening gem on?

Will3808

I’ve got 3 6* generics and am trying to decide who to use them on. I’m thinking nimrod should get one (I’m leveling him up now) and I’m thinking of also using one on infamous iron man so that I can use the saga 6* sigs on him. What do you guys think? Also, is there anyone I’m looking over?

pseudosane

juggernaut and photon would be great targets for AGs