I regularly use my 6* unduped Dom is questing. She doesn't need to be r2 to totally obliterate content. R2ing her would be an AW move and only if duped. I think you'll get more mileage from your resources with Namor.
I have a r2 Domino and she's a savage for content. Fastest potion farmer in the game hands down. Noone can touch her. That said I still think you should take Namor up first and consider her next. She does not need to be awakened. Mines r2 unduped and 0 regrets.
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I regularly use my 6* unduped Dom is questing. She doesn't need to be r2 to totally obliterate content. R2ing her would be an AW move and only if duped. I think you'll get more mileage from your resources with Namor.