Jeskai Artifacts is almost entirely built around artifacts (Mox Opal, Urza's Saga, Emry, Goblin Welder/Engineer chains), so Force of Vigor is a premium answer that can destroy up to two artifacts and/or enchantments at instant speed, even for free on their turn by exiling a green card from your hand instead of paying its mana cost, blowing up their engine pieces or Urza's Saga before it ticks to chapter III. A second Disruptor Flute can tax out their key cards like Mox Opal or Emry. Pithing Needle, Expedition Map, and Skateboard are all low-impact artifacts you'd rather not run into their own artifact hate/Welder targets, and Maze of Ith is weak since they rarely attack with relevant creatures before comboing off. Keep Wasteland in to punish their nonbasic-heavy manabase (Urza's Saga, Seat of the Synod).