There’s some bugs that would have to be fixed first before I would ever attempt this.

I encountered the exact same bug on my first run and second run. After completing all of the challenges before Ansur, walking back to the main corridor with the door leading to the fight, The moment experience is awarded all the checks are done in the door unlocks The main character dies. Possible I’ve done the same order every time but I ended with the chess game and upon walking out I insta die from full health. Reloading the save doing the chess game again and walking out seems to work.