Hydroblast and Blue Elemental Blast are excellent here since the opponent's whole deck is red. Use them to counter or destroy Kessig Flamebreather and Guttersnipe before they snowball damage, or to blast a key burn spell. Sneaky Snacker is blue-black rather than red, so the blasts can't answer it. Graveyard hate like Nihil Spellbomb does interact with Sneaky Snacker: its trigger returns the card from the graveyard, so exiling the opponent's graveyard (for example by sacrificing Spellbomb in response to the trigger) stops it from coming back. Spellbomb is still a slow, narrow answer against this fast clock, so the slots go to the blasts instead. Archaeomancer is too slow and clunky against this fast aggressive clock, and the narrow one-ofs are cut for proactive interaction. Prioritize countering or killing Flamebreather/Guttersnipe on sight, since every subsequent spell they cast punishes you.