Key Commons Person of Interest is very important, to the point where Id consider taking it over staples like Shock, Galvanize and Murder
Magic players are notorious min/maxers, and I cant imagine there will be a 50/50 split between clients followed by a bunch of slow-to-launch Leagues
Cards that play themselves from the graveyard are great here as well
Because of Scams explosive nature there is a floor on just how bad any given matchup can be, while that same explosive nature gives Scam great opportunity against decks that either arent prepared to interact with their threats, or dont have the redundancy to play through multiple discard effects
Negotiate a better price, save on postage
You usually want your removal in Commander to affect more than a single card from a single player, but as far as 1-for-1 removal is concerned, Aura Mutation's worth it