Postapocalyptic is a dark age and therefore quite barbaric. There was a comic called Axa by Romero.
She actually had a sword. I used to play the swedish version of Gammaworld. In this there were a class of mutants with psi-gifts. Very shunned by "normal" folks and robots alike because of their witchpowers.
Axa was enjoyable. The creators of GW probably watched Thundarr or read Brackett and Norton. Several of my buddies played Gamma World. They all liked it.
Conan 2000 anyone?