Whats wrong with the power to control steam (assuming you can also produce it)?
Steam is hot as shit, can be used as a smoke screen, blast a bunch into someones lungs and have it condense into water and drown them, build your own steampunk power armor suit, turn any collection of random crap into steam pipe bombs you throw and expand the steam violently to blast shrapnel everywhere, and best of all make spaghetti in seconds.
I kinda hate Pantheon, havent ever played it, but its the only non-con AP I couldn't really get through listening to.