Official notes
Official wiki for this creature. Official news wins.

You already know the room. The creature is the constant. You are the variable.
They do not die until the hammer.
Slayer · Old School RuneScape
Where
Slayer Tower top
Slayer
Chaeldar, Konar, Nieve/Steve, Duradel.
Hunt
Protect Melee. They do not die until a rock hammer or the slayer helm perk finishes them. Tower is single. Rock melee. Protect Melee. They do not die until a rock hammer or the helm perk finishes them. That is the wipe.
Watch
They do not die until you finish them.
Kill
A kill ends when gargoyle drops. Walk the room if you pulled extras. Reset at the door when the task is done. Wrong prayer or the wrong tile is the wipe. That is the whole file. Do not treat a slayer floor as a raid invocation. Counts, drops, and the living method: the Old School wiki for this hour.