Tempest buff is completely missing the mark again. The problem is that the DPS alacrity build has way too low dps, and the heal build can't fully utilize the alacrity because you don't want to overload water just to keep alacrity up. You waste your best heal and you also lock yourself out of all your healing which is in the water attunement, because you no longer have heals when you cast an aura. Also getting interrupted is very detrimental because the alacrity is at the end, almost making the stability trait while you overload mandetory.