Hydroblast is dead against this deck since they have no red spells or permanents, so this is actually a case for minimal changes. Reconsidering: Hydroblast should stay in the sideboard. This is a mirror-ish grindy matchup where your existing Counterspell, Dispel, and card advantage engines (Mulldrifter, Archaeomancer, Baleful Strix) are already well-positioned, so keep the maindeck largely intact and focus on sequencing around their Spellstutter Sprite and Snuff Out.