Azorius Standstill plays Powder Keg and occasional artifacts/enchantments worth answering, and the extra Naturalize gives us flexible answers beyond our maindeck pair without overcommitting. Thermokarst is weak here since their manabase (Adarkar Wastes, Flooded Strand, basics) has no single key land, so trimming it for more flexible interaction is correct. Sphere of Resistance is strong, taxing their Standstill-protecting counterspells (Counterspell, Mana Leak) and Wrath of God. Keep Wasteland and Rishadan Port in to pressure their mana and punish any greedy Faerie Conclave or Mishra's Factory plays.