Well I don't believe it; I've only gone and spawned it and completed the death room in a few minutes. I gave it another go after taking a break and only had to pull 3 levers, seems the puppets must have pulled the other ones for me. Does not matter what order you pull them in as long as it spells the right word. I used phoenix dive to get near to some of the levers which took me out of combat for a bit and used sneak.
Source vampirism worked this time haven't a clue why it didn't work before, maybe quitting and reloading the game fixed that.
Thanks for your suggestions.
