Dimir Tempo fights on cantrips and free counters, so Consign to Memory is excellent against their Mishra's Bauble and any colorless spells while also eating triggered abilities like Kaito's -2 or Orcish Bowmasters' trigger. Force of Negation adds a second layer of free protection/disruption that can strip their Thoughtseize, Ponder, or a key enchantment-free spell on their turn. Prismatic Ending comes out somewhat since their nonland permanents (Nethergoyf, Moonshadow, Bilbo) are often better handled by Swords to Plowshares already in the mainboard, and Flow State is a weaker cantrip against a deck full of efficient discard and removal that punishes slow draws. Keep the core Brainstorm/Ponder/Force of Will package intact since the mirror-ish grindy matchup rewards card quality and free interaction.

Containment Priest is excellent here, shutting off the tokens from Ocelot Pride, Ajani's enters-the-battlefield trigger, and Guide of Souls synergies since none of those Cat Warrior or Cat tokens are cast. Consign to Memory counters the triggered abilities underlying Ocelot Pride's token generation, Ajani's transform trigger, and Guide of Souls' energy trigger, which is much more valuable than Stifle's single-ability answer against a deck full of recurring triggers. Fire Magic cast as Fira for {2} deals 2 damage, killing Ocelot Pride, Guide of Souls, and Ajani's 2/1 Cat Warrior tokens in one sweep, making it strong versus the opponent's wide, low-toughness board. Curie and Phyrexian Dreadnought come out because they are clunky, slow threats against a deck full of efficient removal like Swords to Plowshares and cheap interaction, while Mishra's Bauble is cut since we want to minimize noncreature spells that feed the opponent's Ocelot Pride engine. Keep the core Brainstorm, Ponder, and Force of Will package intact to maintain consistency while adding targeted answers to the opponent's go-wide game plan.

Containment Priest is excellent here, shutting off Show and Tell (since Atraxa and Omniscience would have to be cast, not just entered) and also exiling any creature that would otherwise cheat into play, which is central to their entire plan. Force of Negation lets you counter Show and Tell, Aluren, or Stock Up for free on their turn, which is crucial since Veil of Summer makes them hard to interact with reactively once they're ready to go off. Stifle is weak here since their key enablers (Aluren, Show and Tell) are static/one-shot effects rather than abilities to Stifle, and Phyrexian Dreadnought is risky to commit mana/creatures into against a deck that can go over the top with Atraxa or Omniscience. Prioritize keeping Force of Will and your cantrips to find these answers quickly.