Pyroblast and Red Elemental Blast have no legal targets here since Mono Red Madness never casts Sneaky Snacker (it only has Mountains), so neither comes in; the Soul-Guide Lantern already in the mainboard stays as-is since it can exile Faithless Looting out of the graveyard before it flashes back, or a Sneaky Snacker waiting there. Electrickery's overload mode ({1}{R}) kills Voldaren Epicure and Sneaky Snacker (1 toughness each) in one sweep, though it whiffs on Guttersnipe and Kessig Flamebreather. Navigator's Compass nets 3 life to blunt the burn clock and counts as an artifact for metalcraft. Keep Prismatic Strands in: naming red prevents all damage from their burn spells and from Guttersnipe, Flamebreather and Epicure, and flashback lets us do it again by tapping an untapped white creature. Trim Bojuka Bog since it enters tapped and taps only for {B}, which doesn't help cast our red or white spells, and the Soul-Guide Lantern already covers graveyard exile. Trim a Ragged Short Spear as well, since a {3} sorcery-speed equip is slow in a matchup built around cheap burn.

Dimir Control is blue-black, giving our anti-blue tech real targets: Pyroblast and Red Elemental Blast can counter Counterspell, Dispel, Brainstorm, or Lorien Revealed, or destroy Spellstutter Sprite, Faerie Seer, Ninja of the Deep Hours, and Baleful Strix. Prismatic Strands is weak here since this control deck rarely wins through combat damage, relying instead on removal and attrition, so it comes out. Keep Dispatch and Galvanic Blast for their creatures, and use the blasts both proactively against their permission and reactively to protect our key threats.

Spy Combo ramps with Wall of Roots, Overgrown Battlement, and Lotus Petal before landing big threats like Lotleth Giant and Generous Ent, so Vandalblast is cheap, efficient answer to any artifact mana they draw. Navigator's Compass provides lifegain to offset early undergrowth damage from Lotleth Giant and smooths our mana. Prismatic Strands is weak since this opponent rarely wins through a wide combat attack with a single damage color, so its damage prevention rarely matters; cut it for proactive answers. Apply early pressure before their ramp engine assembles a dominant board.