Dimir Midrange leans on card advantage engines (Enduring Curiosity, Kaito) and removal (Requiting Hex, Bitter Triumph) rather than a flood of creatures worth Erode's destroy mode, so Duress to strip their key noncreature permanents and planeswalkers before they resolve is much higher value. Keep the full lifegain core intact since Amalia and Haliya outclass their removal suite over a long game. This is mostly a straightforward value swap: proactive discard over situational removal.

Dimir Excruciator wants to disrupt and grind with Duress, Requiting Hex, and sweepers like Deadly Cover-Up, so proactive discard with Duress helps protect our key threats by stripping their removal and sweepers before they can be used. Erode is often a dead draw since this matchup is light on must-answer creatures early and heavier on removal/counters, so trim some copies. Liliana the Faultless loses value against a deck full of removal that can kill your payoffs before they matter, so trim some copies there as well.

Mono Green Landfall ramps into big threats like Mossborn Hydra and Mightform Harmonizer; Seam Rip can exile cheap mana dorks and enablers like Llanowar Elves or Sazh's Chocobo (both mana value 1) before they snowball. Curious Farm Animals can trade with their small creatures and gain extra life to fuel our engines. Liliana the Faultless and Essence Channeler are both fragile 1-toughness bodies that die easily to their creatures in combat and don't close games fast enough against a ramp strategy, so trim them for more interaction.