This mirror-ish matchup is a battle of card quality and tempo, so Deem Inferior comes out since it's too slow against a deck full of cheap disruption like Spellstutter Sprite and Brinebarrow Intruder that can be replayed or reset. Gut Shot is excellent here, picking off their army of one-toughness Faeries like Faerie Seer, Faerie Miscreant, Snaremaster Sprite, and Spellstutter Sprite for free or for just 2 life, disrupting their tempo plays before they can chain into card advantage. Keep the full core engine intact, as Cryptic Serpent and Tolarian Terror are your best way to close games once both sides run out of gas, and Counterspell remains crucial to protect your threats or stop their card advantage engines like Ninja of the Deep Hours and the enchantment creature Moon-Circuit Hacker.