That's why I said I'd be giving him the "Arcane Background: Superhero" edge. Nothing in the handbook says that a MARS character has any complications with arcane backgrounds. MARS characters don't actually have complications like Juicers or Combat Cyborgs, which can't use any kind of magic or psionics.
So in this case, mixing an Arcane Background: Superhero, which gives a lot of PP but only one power, with a few items that require PP, is an efficient use of those PP, I think. It allows him to use the items I've come to want (TK Revolver, Combat Mage Armor, and Waveboard), but he isn't really a magical/psionic type of person. He's a gunslinger cyborg. The one power I'm going to give him is Clairvoyance, because he's a headhunter/lawman, and that will allow him to find people easier.
His cybernetic implants, which I'll be posting soon, are mostly vision and survival, as he is used to living on his own. Internal life support, optics package, targeting eye, etc. I've never played this game before, so I'm not sure what works together and what doesn't, but his PP will fuel his ammo, armor and travel, and his cybernetics will take care of survivability and fighting ability. It seems to math up pretty well, so far.