Anger of the Gods is a strong sweeper against Rakdos Sacrifice's low-toughness swarm, exiling Cauldron Familiar, Shambling Ghast, Greedy Freebooter, and Biotech Specialist so they can't be recurred or trigger death effects as easily. Chandra's Defeat is dead here since the opponent has no red creatures or Chandra planeswalkers, so it stays in the sideboard; that said, we still want Change the Equation or removal focus more than countermagic. Spell Snare and Make Disappear are trimmed because this deck's sacrifice engine (Witch's Oven, Deadly Dispute, Mayhem Devil) doesn't care about countering individual spells once the pieces are assembled. Focus removal on Mayhem Devil and The Sackville-Bagginses, the key pieces that punish you for interacting with their sacrifice loop.