This is the exact mirror match, so the game is decided by who assembles Agatha's Soul Cauldron and their mana engine first. Fade from History is a strong equalizer, wiping both players' Agatha's Soul Cauldrons and Leyline of Abundance while leaving each player with a 2/2 Bear, which can reset a losing board state. Collector Ouphe shuts off their Agatha's Soul Cauldron activations and Walking Ballista pings, though it also shuts off your own Cauldron and Walking Ballista activations. Keep your full complement of acceleration since speed is paramount in the mirror; only trim redundant value creatures for the sweeper effect.