Mimic (w/ Colossus, Wolverine, Beast, Northstar, and Cyclops' powers)
VS
Wonder Man (ionic)
Who wins?
SCA
ScarletSpiderBen Reilly
Wonder Man's stronger, if he can get in a good batch of full out hits in at the start, he can wear Mimic down enough to take him out. Otherwise I think Mimic has greater fighting prowess and a good set of abilities to eventually be able to take down Wondy.