w00t!
Ok, perhaps it's just an old 60 instance. But I've heard who people managed to solo this place. So I wanted to try it myself.
I died twice, one time to the stupid eye, the one that will yell "the living is here!" while I was in a middle of a group. second I died while fighting the elites skeletons that will spawn after you kill those big fellas in front of Baron's tower.
I couldn't make the 45 minute as I forgot to kill the people inside the 3 ziggurat. Had to backtrack to kill them so I waste time there.
Baron himself was a push over. He didn't do anything at first when I sprinted to him and started to attack him, perhaps he ws shocked to see me.

He died quite easily when i pump AR+BF+Trinket+Evasion. Still I had to down a health pot though.
Too bad he didn't drop his mount.
Now that I can solo this place, perhaps I can go here regularly to farm him for his mount.