Affinity is an artifact deck top to bottom, so Meltdown for X=1 or X=2 can wipe out Mishra's Bauble, Mox Opal, Tormod's Crypt, Claws of Gix, and Welding Jar in one sweep, and a bigger Meltdown catches Pinnacle Emissary or Kappa Cannoneer. Wear/Tear's artifact-destroying half is clean spot removal for a problematic Kappa Cannoneer or an Urza's Saga construct. Cut Burning Inquiry since you don't want to hand extra cards to a deck that rebuilds fast off artifacts, and trim Practiced Offense since it does nothing to interact with their board.