I dual boxed it a couple weeks ago on 90NIN + 90RDM. Tank from the back, wear as much crit stuff as you can to keep the heads broken; it wasn't bad at all.
Worst part of it is that it won't die until it regens all its heads. I took four people out to kill it a few months back and we were holding it at 1% HP until it finished repopping its heads.
I dual boxed it a couple weeks ago on 90NIN + 90RDM. Tank from the back, wear as much crit stuff as you can to keep the heads broken; it wasn't bad at all.
How long did this take? You don't have one of your wonderful vids do you?