Boros Moxite has no blue cards, so Red Elemental Blast has no legal targets here and should actually stay in the sideboard; instead, Go for the Throat is the priority, killing Kor Skyfisher or Glint Hawk cleanly since neither is an artifact. Troublemaker Ouphe can exile a key artifact like Melded Moxite or an Equipment such as Ragged Short Spear if bargained. Keep the full sacrifice/card-draw engine intact since grinding through their aggressive artifact-equipment plan with incremental advantage is how this matchup is won; trim some slower card-advantage pieces like Toxin Analysis and Eviscerator's Insight for more proactive removal.