I'm sure you all know which one I'm talking about. Can't kill him because you absorb the souls, and he stays invul.

I'm pretty sure my game is fuqed until this is fixed. I've tried eeeevery trick, nothin'. This DLC has been out for 3 years? Get your [censored] together, Bethesda. :/ Sigh.

Patches also stopped 2 1/2 years ago.

I highly doubt any fixes are going to happen since they have moved on to a different project.