Against Mono Red Madness, Pyroblast is dead weight against their red cards and should stay home; against your own errant instincts, resist boarding it in, but Blue Elemental Blast is fully live to counter their red spells and destroy their red permanents. Also lean on your existing Skred and Fiery Cannonade to clear Guttersnipe and Voldaren Epicure, while using Skred to take down Kessig Flamebreather. Spell Pierce is weak since their spells are cheap and they play around it easily, and Murmuring Mystic's 1/5 body is fine on defense but you need more interaction than tokens against a fast burn plan, so trim one copy. Prioritize surviving to Tolarian Terror and Skred while using Counterspell on their key payoff creatures.

Dimir Control's clock relies partly on graveyard-fueled threats like Gurmag Angler (delve) and Ninja of the Deep Hours triggers, and Tormod's Crypt can strip their graveyard to blunt Gurmag Angler's delve cost, though note it does nothing against their Spellstutter Sprite or hand-based plays. Annul is mostly a sideboard hedge against their few nonland artifacts (Contaminated Aquifer isn't an artifact, so Annul has limited targets here) — consider this a lower-impact include, but their deck runs almost no artifacts or enchantments, so weigh cutting Annul back if you find better options; still, it's a reasonable speculative slot. Fiery Cannonade has few good targets against their small creature suite of 1-3 toughness fliers like Spellstutter Sprite and Faerie Seer, so trimming it slightly for grindier tools is reasonable. This is a long, grindy control mirror where card advantage engines like Lorien Revealed and Murmuring Mystic are premium — protect them with Counterspell.

This matchup hinges entirely on graveyard density, so Tormod's Crypt is a premium tool that can blank Tolarian Terror and Cryptic Serpent, forcing them back to full price and stranding cards in hand. Blue Elemental Blast counters or destroys nothing here since the opponent is mono-blue, so it stays in the board, but note it is only relevant if they somehow present red permanents; using Annul to strip Force Spike-style disruption is irrelevant since it only hits artifacts and enchantments, and it cannot counter Steel Sabotage since that is an instant spell, so leave it in the board and favor Counterspell and Spell Pierce mirrors. Fiery Cannonade and Skred are weak against a deck whose threats are 5/5 and 6/5 bodies, so trim toward more proactive disruption and card selection. Preordain is cut in favor of graveyard disruption since finding lands matters less than denying their engine. Keep the full Counterspell and Lightning Bolt/Skred core otherwise, since Delver of Secrets and early creatures still need answers.