Pull and kill Bi'tithu then walk around his spawn point for a noclip floor section and fall down. Kill the trash you find. Flip the lever to unlock Sandstorm's room.
Go to to Sandstorm's room (the NE room) and kill him. Then look for an interact-able statue/object. This will unlock Impaler Tzilug's prison.
Head to the room directly south and kill Gear of the Ancients. Flip the lever.
Take the hall south and follow the corridor west, then around the u bend and north. Kill Impaler Tzilug in the north west room.
Backtrack down to the southern-most hall and enter the southern room in the hallway.
Click the sathirian scroll. Three named will spawn: before attacking examine each named's buff bar .
one of them with have a buff that causes them to deathsave the other two. The same named always has the buff but their spawn locations are random.
Exit the room through the south doors and take the teleporter to Drusella Sathir's room
Drusella Sathir: during your fight with her she casts a ritual ability and emotes about it that causes bones to pop up around her. While it is up any damage she takes will heal her.
I am trying to work through this now for my Coercer quest, but all three handmaidens have the death save. I will update this again once I find out what causes it.
"Hand of Thera'ta" - Thera'ta has mastered ancient necromantic rituals to prevent her sisters' death.
