Mono Red Rally floods the board with small creatures (Burning-Tree Emissary 2/2, Clockwork Percussionist 1/1, Goblin Tomb Raider 1/2, Voldaren Epicure 1/1, Rally tokens at 1/1) and uses Rally at the Hornburg to make two more bodies and give Humans haste, so Fiery Cannonade's 2 damage to each non-Pirate creature is a huge blowout that can wipe most of their board. Goblin Tomb Raider is a Goblin Pirate and survives it, so keep Lightning Bolt or Fiery Temper ready for that one. Cast into the Fire can deal 1 damage to each of up to two target creatures, cleaning up Gingerbrute or a Rally token, or exile an artifact like Clockwork Percussionist or Inventor's Axe. Vampire's Kiss and Sazacap's Brew are too slow against a deck that can kill from nowhere with a critical mass of creatures, so they come out for proactive sweepers. Prioritize casting Fiery Cannonade right before they would otherwise go wide and swing.