Stern Scolding counters Solitude (toughness 2, so it is a legal target, and it can be hit even when evoked for free) before it can exile your key threats. Consign to Memory counters triggered abilities and colorless spells, so it answers Solitude's enters trigger and also hits Isochron Scepter, and replicate lets you copy it to cover more than one target. It can't counter activated abilities like Jace's loyalty abilities or the Scepter's copy activation. Stubborn Denial is a soft counter that a control deck with cheap spells can often pay for, and it can't stop an uncounterable Supreme Verdict. Quantum Riddler and a pair of Territorial Kavu are too slow against Supreme Verdict and Wrath of the Skies sweepers. Keep your low curve of Ragavan, Wild Nacatl, and burn to pressure them under Teferi, Time Raveler before they stabilize. Leyline of the Guildpact makes your lands every basic land type, which keeps your domain cards strong, but it gives no protection from their removal, and it won't stop Solitude or Prismatic Ending.