Hey everyone,
So I am playing on ps4 - I don't know if this changes things or not - but I figured out a way to save Bruthor.
So what you need to do is have a scoundrel sneak around the prison and free all the prisoners without getting spotted. Free the humans first then the imps. Then you follow the imps down the hill, past Bruthor's cell and this should aggro the guards (if it doesn't attack them as the imps run past).
This will trigger an instance where you are fighting the guards and Bruthor with the imps on your side. You want to keep the imps alive because they come into the game later if you do. During the battle use teleport on Bruthor. Teleport him onto the stairs near the entrance to the prison. This will turn him from being aggro to you to aggro to the guards. It also makes his dialogue make sense, so I am pretty sure this is what the writers intended.
So far as I can tell you don't get anything from doing this (or at least I haven't found it yet) but it is pretty cool.
I can't find this anywhere on the forums or reddit, but if anyone has found a way to interact with Bruthor after you free him please let me know.
