namor just trashed ironman recently. he did pull him into the sea. anyone of them could possibly win depending on who fought who and where they are fighting. i'd say more often than not IM in a neutral spot, but if he got careless herc or namor could peel him like a banana. he's the smartest though, so i'd give him a very slight edge with namor and herc getting some wins and TS getting the least.
that's without any of these powerups you're talking about . . .