Seriously ArenaNet, why would you put a fight like this in the game? I thought some of the other story line fights were ridiculous, but I take it back, they were nothing compared to this mess. Google it, you will see dozens of posts of people saying the exact same thing. I finally beat it, not through any skill or even luck, through simple attrition. Die, go back in take 1% or so of his health off if I was lucky, rinse and repeat for 30 to 40 minutes until he was dead.
I know some of the great defenders are going to come out and say they single shotted it, which I seriously doubt, but even so, I had a horrible time with it and will not be doing the story line on any alts simply because I do not want to have to do that fight again.