QUOTE(SilkySlime @ Oct 31 2025, 14:50) 

I got one-shotted by the "Invisible Pink Unicorn"
I play 1h debuffer and the key move against everything is Silence (3 targets aoe). This restricts the boss to basic attacks and crits, which should not be able to oneshot you unless the difficulty is too crazy for your level and gear. Weaken then fixes that. Sleep also makes a huge difference when there's a bigger crowd.
An alternative play, more fitting for MB hover type combat, is to go high evade/block/resist, have Spark of Life active and spirit draughts/potions ready, and rely on Stun to only give the target minimum opportunity to act. Can be a mix of skill usage, parry/counter stun, and club weapon stun effect. If a fatal hit does go through, a spirit potion will instantly recover the shield. Just don't get hit twice back to back; fall back to Silence if that happens.
The unicorn is fairly chonky but not nearly as bad as FSM which feels like it has 5 times the hp. On the wiki I see that it has a nasty set of resistances. I have very quickly settled on using Void element weapons (ethereal prefix, or lvl10 item world) where all those resistances ought to be nullified (I hope). Weapons with Penetrated Armor effect and the Imperil spell will speed up the killing, as will using the Vital Strike skill when the target is stunned.