Esper Control is loaded with blue spells (Narset, Teferi, Day's Undoing, Jace) and a handful of cheap counterspells, so Mystical Dispute at its discounted {U} cost is premium interaction that can also fight through their own Mystical Disputes. Supreme Verdict can't be countered, so neither Mystical Dispute nor Force of Negation can stop it; don't count on them for that. Our own Teferi, Time Raveler is huge since it shuts off their Orim's Chant and Silence from being cast at instant speed relative to our turn and can bounce a Solitude or Isochron Scepter. Endurance and Subtlety are weaker since their graveyard plan is minimal and Subtlety only hits creature or planeswalker spells, and the spell's owner chooses the top or bottom of their library, so they'll likely put Solitude on top and redraw it; trim Colossal Skyturtle since a seven-mana creature is clunky against a deck full of counterspells and wraths. Keep Force of Negation in since countering a planeswalker like Narset or Teferi, or a noncreature spell like Wrath of the Skies or Day's Undoing, is critical.