I like both Duke and Snake Eyes, though I do think they might be a bit overused (especially Snake Eyes). Right now I don't have any plans to use SE or Duke in my dios for the time being. If I were to use Snake Eyes, I would use the one I got with the 25th 5 pack. My favorite Snake Eyes stories in both the cartoon and comic were when he was in this outfit. I definitely prefer him as a commando over an invincible ninja. No swords for him.

As for Duke, I think I would use him like Jack Bauer from 24. Leading missions in the field and doing them his own way.