>>535176542
The problem is the boss frequently darts around while transformed and the Hydro Traveler's projectiles are slow as fuck. Most players would likely need 3-4 skill uses(this assumes you're not getting interrupted and Hydro Traveler only has 0.5 IR) to take it down like that and each one needs 16s minimum. Even with good aim it's still only a minor time save over waiting for the dives unless you can manage to take it down in two skill uses.
>>535176879
Shut the fuck up and learn your fucking place you clueless shitstain. The feathers and divebombs don't even happen until after the transformation which is on a fixed timer. It is a fact that most characters can not consistently apply Hydro to the boss immediately after it transforms and Furina trivializes it. The first feather doesn't even appear until after a lengthy attack pattern. The boss is designed to waste time.