Realistically how many variants could he kill?

If Omni man was on earth during the war and had all 18 variants (show versions) attacking him at once. How many could he kill. If he wins what kind of injuries are we talking? I think he could take every one on individually. but together they definitely win. Some variants even killed their own (most likely weaker) variants of him, so It would be interesting.

If Omni man was on earth during the war and had all 18 variants (show versions) attacking him at once. How many could he kill. If he wins what kind of injuries are we talking? I think he could take every one on individually. but together they definitely win. Some variants even killed their own (most likely weaker) variants of him, so It would be interesting.