Both really useful; but CGR's let's him manage buffs in a way few Cosmic champions can. You can also leave at Sig 1, unless for Prestige, since the damage is kind of superfluous given his insane combat damage.
Doom's is nice, but doesn't fundamentally change him.
Comments
Doom is alright without awakening but his duped will be nice for prestige & gain power on nullifying power gain from opponent.
You decide who would you prefer for your upcoming content !
No doubt he has the most beastly crits ever seen but he also has 1 of the strongest sig ability in the game .
Doom's is nice, but doesn't fundamentally change him.