Consign to Memory counters triggered abilities and colorless spells for cheap. Most of their threats are colored spells, and it can't touch Narset's or Teferi's static abilities, so weight it mainly against Solitude's enter-the-battlefield exile trigger, Isochron Scepter's imprint trigger, and Isochron Scepter itself, their only colorless spell. It can't answer the Scepter's activated copy ability, so don't count on it there. Mystical Dispute is cheap, efficient interaction against their blue spells (Teferi, Day's Undoing, Consign to Memory, Jace). Unearth is weak since Solitude and Orim's Chant disrupt our tempo and our 3-or-less creatures aren't the priority reanimation targets against control's removal-light board. Fatal Push struggles vs their lack of early creatures, but Counterspell and Thoughtseize remain premium against their planeswalkers and Wrath of the Skies (Supreme Verdict can't be countered, so Thoughtseize is the better answer there).