Turn 1:

>me 1st action: Create Water on your group, getting you vulnerable to Lightning damage

>Shadowheart 1st action: Twinned Witch Bolt upcasted to level 6 with channel divinity and Luck of The Far Realms crit for 288 damage on 2 enemies, gains 1 action from bloodlust elixir

>Shadowheart 2nd action: Quickspell Witch Bolt upcasted to level 5 with Rhapsody crit, up to 240 damage

>Shadowheart 3rd action: Twinned Haste

>Shadowheart 4th action: Chain Lightning (arcane battery) with Channel divinity for 160 damage on 4 enemies

>me 2nd action: Twinned Chain lightning with channel divinity for 336 damage on 4 enemies, gains 1 action from bloodlust elixir

>me 3rd action: Twinned Witch Bolt upcasted to level 6 with channel divinity and Luck of The Far Realms crit for 288 damage on 2 enemies

>me 4th action: Quickspell Chain Lightning (arcane battery), up to 160 on 4 targets

Your response?