Devoted Combo wants to chain mana dorks (Devoted Druid, Delighted Halfling, Birds of Paradise) into a huge Craterhoof Behemoth or Green Sun's Zenith toolbox turn, and Pyroclasm can wipe out their army of 0/2s, 1/2s, and 2/2s before they combo off, especially hitting Devoted Druid and Badgermole Cub. Damping Sphere taxes their multi-spell turns, though its mana-capping ability only applies if a land is tapped for two or more mana, not mana dorks. We're not racing this deck reliably since it can go infinite, so trimming a pure face-burn spell like Boltwave for more disruption is correct, along with Shard Volley since we need our lands to survive to deploy Damping Sphere and keep pressuring. Prioritize disrupting their engine over pure damage racing here.