[X] Propose a different plan.
-[X] We will instead approach the Devil vessel at maximum speed. Once it is in visual range, Viserys will Teleport to within Firebrand range of the vessel, cast a Quickened, Searing, Agonizing Firebrand targeting every visible enemy, taking care to avoid directly damaging the vessel, then make a strafing pass using Maximized, Searing, Agonizing, Dispelling Fire Breath, again attempting to prevent unnecessary damage to the vessel.
--[X] Immediately after Viserys' strafing attack, Dany will Teleport herself, Richard, Rina, and two of Yrten's crew, while Tyene Teleports herself, Waymar, Yrten, and two more of his crew, all aiming for cleared areas of the deck. If she is capable and willing, it would also be helpful if Siduri could Teleport another strike team to the Devil vessel.
--[X] Meanwhile, the Golden Wind will approach, hopefully unmolested by the distracted Devil's, in order to lend the support of its crew and weapons to our attack.
-[X] Just before the Devil vessel is to be attacked;
--[X] Tyene will cast Fickle Winds on the party, along with Yrten, Siduri, and the four members of his crew Teleporting over with herself and Dany. She also casts Mass Resist Energy (Cold) and Mass Resist Energy (Fire) on everyone (using four 2nd level spell slots). She also renews her Greater Blindsight spell.
--[X] Dany and Rina renew their Sign spells.
--[X] Waymar renews his See Invisibility and Heart of Earth spells.
--[X] Viserys renews his Heart of Earth spell, if necessary, uses Magic Army to enhance everyone's weapons, then casts Mirror Image, Scinitillating Scales, Starmantle, and Greater Blink. Just before beginning the attack, he casts Searing, Agonizing Mass Fire Shield on the party, all of Yrten's crew Teleporting over, and as many other volunteers as he can manage, then casts Arcane Spellsurge (using two 6th level spell slots).