Mono Green Landfall wants to curve out with mana dorks and early landfall creatures, then land bigger threats and enchantments like Earthbender Ascension. Seam Rip is a cheap enchantment that can exile Llanowar Elves, Sazh's Chocobo, or Keen-Eyed Curator (all mana value 2 or less) until it leaves the battlefield. That slows their ramp or snuffs a growing landfall threat. It can't hit Earthbender Ascension, which has mana value 3, and it has no lifegain effect of its own. Curious Farm Animals is a cheap creature that triggers your creature-enters lifegain effects like Case of the Uneaten Feast and Haliya, and it gains you 3 life when it dies. It can also sacrifice itself for {2} to destroy an Earthbender Ascension or Sapling Nursery if needed. Aunt May and one Enlightened Confidant are lower-impact 1-2 drops that don't block well against bigger green bodies, so they come out for more proactive interaction. Keep the core lifegain engine (Haliya, Case, Starscape Cleric, Lunar Convocation) intact since the matchup is still a race you can win by draining them out.

Dimir Midrange leans on Kaito, Bane of Nightmares, Enduring Curiosity, and removal like Requiting Hex/Bitter Triumph; Duress strips removal or Kaito before it lands, which is crucial since Amalia and Haliya are both vulnerable to their answers. Bloodthirsty Conqueror is a resilient flying deathtouch body that gains you life off their own damage-based effects, giving a strong top-end threat against their grindy removal suite. Aunt May and two copies of Liliana the Faultless are cut since they're low-impact against a deck full of efficient removal and card advantage rather than go-wide swarms. Keep Amalia, Case of the Uneaten Feast, and the lifegain shell intact as your primary win condition against their attrition plan.

BRG goes wide with cheap creatures like Gene Pollinator, Greedy Freebooter, and Rottenmouth Viper; Vicious Rivalry can be cast for X=1 or X=2 to wipe their swarm of small mana value creatures (and your own, so time it after you've committed bigger threats). Bloodthirsty Conqueror's flying deathtouch body trades well with their bigger creatures like The Sackville-Bagginses or Smaug the Magnificent while its lifegain trigger punishes their damage-based plan. Aunt May is too passive against their aggressive curve, and one Erode comes out since many of their cheap creatures aren't worth a card of removal. Keep the rest of the lifegain core to out-value their grindy card advantage engine.