yeah the umbrella is really good against the smichichen warrior guy or however you spell it when he starts lobbing blasts. that and the whistle.
also when the smichichen guy floats in the air i found out by accident that the anti-air deathblow thing one shots him
. i was just jumping up to smack him with my sword and i did the deathblow. took me a second to realize what happened because his health/posture wasnt anything near it
headless is more about finding that balance between aggression with the divine confetti buff and not being too greedy when you see his attacks coming, because they will 2 shot you, and you have to deflect because terror will kill you if you block 2-3 shots. but he also moves in slow motion. i was more annoyed fighting him in the water.