Blue Elemental Blast is excellent against this all-red Goblin deck, cheaply countering key spells like Siege-Gang Commander's activated pings aside (it only hits spells/permanents, not abilities) or destroying red permanents like Goblin Warchief and Siege-Gang Commander tokens. Essence Flare can help stabilize the board by shrinking down a key attacker over time via its -0/-1 counters each upkeep, buying time against the aggressive Goblin curve. This matchup is a race where you need interaction, not card selection, so trim slower cantrips like Flash of Insight and the clunky Thwart for proactive removal and counters. Prioritize keeping Daze and Foil up to protect your own clock while using the new removal to blunt their early aggression.