Selesnya Company floods the board fast with Elvish Mystic, Llanowar Elves, and Collected Company, and Archon of Emeria plus Thalia, Guardian of Thraben tax our spells, so we want cheap efficient plays. Mystical Dispute is mediocre here since they run few blue spells, but it still answers March of Otherworldly Light or Beza from their sideboard at full cost, and more importantly frees a slot for Kutzil's Flanker as a resilient flash blocker that can also exile a graveyard against Enduring Innocence recursion. Get Out is awkward against Archon of Emeria's one-spell-per-turn restriction, so trimming copies for proactive bodies helps. Keep Temporary Lockdown and Supreme Verdict as the key sweepers against their low-cost creature swarm.