Answer after two jumps.
Replication and metamorphosis at a genetic level, that’s what. Not only can I copy One-Punch Man through and through, but I can also make clones of myself and tell said clones to turn into One-Punch Man.
OK, so the examples are incompatible (X-gene=/=Inhuman), but think about all the possibilities: I can simply pull out a clone and send that double off posing as another person for some errand or task while I go about with plumbing, or if a hero is needed but is on another mission I can just send a double.
Pretty sure you have a power-up combo that’s powerful, but you can’t beat mine. Still, feel free to dish it in the comments.