Devoted Combo wants to chain Devoted Druid mana into Craterhoof Behemoth or Fiend Artisan tutor chains, so Toxic Deluge is your best answer to a wide board of dorks before they go off. Engineered Explosives clips their mana dorks (Delighted Halfling, Devoted Druid, Birds of Paradise), while Nihil Spellbomb and Ghost Vacuum provide ongoing graveyard exile against Tyvar, Jubilant Brawler and Agatha's Soul Cauldron value. Counterspells are weaker here since they can go under them with cheap creatures and Green Sun's Zenith, so trim Force of Negation and some Counterspell copies for proactive removal and sweepers. Keep Fatal Push and Sheoldred's Edict as premium removal against Devoted Druid and Vizier of Remedies, and race with Psychic Frog before they assemble the full combo.