Unkillable Sarevok(Not SCS related?)

Hey everyone. I've got a fairly big(probably messed up) EET install. I can't seem to kill Sarevok.

I do NOT have the SCS Improved Final Battle installed. I can kill his lackeys, they don't become skeletal warriors.

Sarevok doesn't actually talk to me. I can walk right up to him, and he just doesn't regard me. If I try talking to him, then the fight starts, I beat the crap out of him, but only to 1hp and he keeps going.

I CAN kill him by EEKeeping in a scroll of drain energy, but then he almost always explodes, which is a problem as I'm using the Sword of Chaos mod, to delay SOD. So I kill him, and nothing happens. No quest, nothing.

Another thing of note, Diarmid isn't among his lackeys. I actually killed him in the catacombs exit.

I'm sure there's some wacky bug that I'm running into, with this smorgasbord of mods. Does anyone have any suggestion on where to start looking? Should I upload my mod list?