This matchup is a race decided by who turns on their payoffs first, so Fiery Cannonade is excellent since it kills Guttersnipe (2/2) and Voldaren Epicure (1/1) while only catching our smallest creatures; it does not kill their 1/3 Kessig Flamebreather but still clears blockers and removes multiple threats per card. Electrickery, overloaded for {1}{R}, wipes all their Voldaren Epicures and any other 1-toughness creature cheaply. We cut the slower card-draw sorceries (Highway Robbery, the extra Sazacap's Brew) since in a race we want removal and damage over incremental card advantage. Keep Lightning Bolt and Fiery Temper as our own clock and reach; this matchup is close to a coin flip on the play/draw, so maximizing early interaction matters most.

Dimir Control grinds with counterspells (Counterspell, Spell Pierce), removal (Snuff Out, Cast Down, Agony Warp), and card advantage (Lorien Revealed, Brainstorm), so we want to apply pressure efficiently rather than overextend into sweepers they don't really have. Nihil Spellbomb is mild graveyard disruption against their Gurmag Angler delve costs and can cantrip later, which is a reasonable value add in a longer game. Electrickery's overload is weak here since most of their creatures (Spellstutter Sprite, Faerie Seer, Augur of Bolas) have only 1 toughness, so it can still two-for-one them cheaply. We trim card-neutral grinding sorceries for incremental value pieces since the matchup becomes a long game where any extra resource helps; keep our discard outlets and burn as the primary way to close since they have little life gain.

Affinity floods the board with small efficient artifact creatures like Glint Hawk (2/2), Kor Skyfisher (2/3), and Refurbished Familiar (2/1), so Fiery Cannonade is a strong sweeper that kills Glint Hawk and Refurbished Familiar outright and damages the rest, though it leaves Kor Skyfisher and Utrom Monitor alive. Nihil Spellbomb doesn't interact with their artifacts directly but can still exile a graveyard if they lean on Blood Fountain recursion, and cantrips later for value. We cut the slower draw sorceries since this matchup rewards tempo and sweepers over incremental card advantage; keep our removal suite (Lightning Bolt, Fiery Temper) to pick off anything Cannonade doesn't kill.