Annul is a strong answer here, countering Opalescence, Parallax Wave, or Attunement before the combo locks you out. It only hits artifact and enchantment spells, so Replenish (a sorcery) has to be handled by your other counters like Counterspell and Daze. Hydroblast has no red targets in this matchup, since the opponent plays no red cards, so it stays in the sideboard. Thwart is awkward here, since its alternate cost means returning three Islands and its hard cost is four mana, so cut it for proactive answers. Stasis is still a core piece of the plan, since skipping untap steps keeps them from rebuilding their mana after Replenish resolves.