Yes, teaming up is the correct answer to beating a Nemesis.<br/><br/>Nullify wouldn't work any better than anything else, really.  After all, the ideal power to defeat Mr. Nullifying Man is Immunity (Nullification of Nemesis).  Or just reinstating Nemesis (a free action) and whacking him.<br/><br/>Besides, there's not much point to this game if the hunters never get their quarry.<br/><br/>BWAHAHAHA!