A nice thought but only one problem Susano will not get wrecked beacuse of Yata no kagami and to keep Itachi inside water dome kisame will need to be in range and that would not go well for him since Itachi only need a finger to cast genjutsu from mid distance.
also Amaterasu burns everything so ones Itachi uses it will start burning Water created by Kisame, and it will not effect Itachi because he is safe behind his susanoo, by the time he will run out of chakra Kisame would be dead by Amaterasu.
To avoid Amaterasu Kisame will need to move away from Itachi and that water dome will move with him.