Hehe, after a month of several failed attempts to simply get down there, I finaly convince some of my guildies to go down and camp it with me. As it happened, they were all 50+ so it was no biggy cuting throu the undead and live alike.
Anyways we finaly get to the ***/sup room, right as we get there 2 knights spwan, and are killed quickly.So we settle down for a 2 or 3 hr wait. I just happen to turn around and see a froggy corpse laying in the wall, that must have been killed by a previous group. Just outa boredom I decide to loot it to see if there's any thing intersting on it.
Much to my surprise it was an assassin's corpse and it had the mask, loot it, put it on to show off, and then port out. All-in-all we "camped" the room for maybe 3 min. So it was a very lucky break for us.