Sultai Reanimator wants to fill the graveyard and reanimate huge threats like Bringer of the Last Gift and Overlord of the Balemurk, so proactive disruption and sweepers matter more than small removal. Bring in all three Duress to strip noncreature spells like Rapid Rescue or Commune with Beavers before they land, and add Day of Black Sun as a hard removal spell that destroys their key creatures. Outrageous Robbery is a strong value/tempo instant that helps you keep pace with their card advantage engines. Sear and Nowhere to Run are too small against the 5/5s and 6/6s this deck fields, and Spell Snare is mostly dead since few of their key spells cost exactly 2. Keep the full core engine intact since Jeskai Revelation and Deadly Cover-Up remain excellent answers to their board states.