Dimir Excruciator leans on Deadly Cover-Up as a one-sided wrath and big top-end like Doomsday Excruciator and Overlord of the Balemurk, so Disdainful Stroke is excellent against those four-plus-mana threats and sweepers. Spell Pierce taxes their removal and Duress effects when they're tapped out. Bounce Off and Vibrant Outburst are cut since Bounce Off doesn't stop a resolved Deadly Cover-Up and Vibrant Outburst's damage is too small to matter against their resilient threats. Race quickly before their discard (Duress, Theorix Charm) and removal strip your hand.