Mono-Green Landfall wants to go over the top with Mightform Harmonizer, Mossborn Hydra, and Bristly Bill counters, so Chainsaw's immediate 3 damage answers most of their early creatures (Llanowar Elves, Sazh's Chocobo) while growing into a real threat later. Rest in Peace is excellent here since it strips Icetill Explorer and Mole Man's graveyard-recursion of lands and denies Esper Origins' flashback. Raubahn's ward is weak against their creature-based board so we trim it, and Doc Ock's Tentacles is too slow against a deck that curves out with cheap threats; we want to be proactive and race before Sapling Nursery or double Mightform Harmonizer buries us.

Dimir Midrange is loaded with cheap removal (Bitter Triumph, Requiting Hex, We Say Thee Nay!) and card advantage engines like Kaito and Enduring Curiosity, so we want resilient threats that punish them for casting noncreature spells. The Queen of Dale triggers on their first noncreature spell each turn, letting us filter our draw and potentially make a token whenever they fire off a removal spell or counterspell. Bofur's adventure instant protects a key creature from Bitter Triumph or Requiting Hex at a critical moment, and Basilisk Collar gives one of our dwarves deathtouch and lifelink, letting it trade with anything that dares block it and gain us life back against their removal-heavy plan. Doc Ock's Tentacles and some copies of Dragonfire Blade are too passive against a deck that wants to grind, so they make way.

BRG's midrange plan features small value creatures like Gene Pollinator, The Sackville-Bagginses, and Umbral Collar Zealot, so Chainsaw's immediate 3 damage cleanly answers most of their early board while growing into a bigger threat as creatures die on both sides. Bofur's adventure protects our key creature from their removal suite (Deadly Precision, Witherbloom Charm). Raubahn's ward is less relevant against a deck without much direct removal targeting, and its Equipment-attaching trigger is redundant with our existing plan, so we trim it for more immediate impact. Doc Ock's Tentacles remains too slow and situational against their proactive curve.