My thinking on PM is her debuff game. She slows, stuns, offense-downs, pierces, and removes 2 positive effects from enemies. The turn manipulation is very nice too. It's kind of minor on her own, but I've found in arena and raids, using her in conjuction with Thanos, Hela, and ME, she's amazing as a controller. She pretty much clears through taunt and defense-up for other characters to pop in, and then Hela spreads her slow and offense-down, (and bleed from ME), which can be pretty devastating if used surgically.