This is a Dimir-on-Dimir matchup, so proactive discard is excellent at stripping their Kaito, Bane of Nightmares and their removal and counterspells before they generate value. Terminal Criticism cleanly answers their blue permanents like Floodpits Drowner, Spyglass Siren, and Kaito while gaining life. Shoot the Sheriff is weaker here because Spyglass Siren (a Pirate) and Azure Beastbinder (a Rogue) are outlaws and dodge it, and Kaito is only a creature on his controller's turn, when he also has hexproof, so it's cut for better interaction. Sphinx of False Conclusions is a fragile 4/2 that dies to their Bitter Triumph and Shoot the Sheriff, so it steps aside for Duress. Keep the rest of the removal suite and the Spell Snares, since their curve has plenty of two-drops like Floodpits Drowner and Azure Beastbinder, plus two-mana removal like Bitter Triumph.