If you are going to go into this and get all the way to Alak Hul, know that you can't just kill the wardens immediately. Actually know the quest. Some people you are playing with only had 10 more minutes, and they would have made it if you didn't -blam!- it all up.
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I went in with a friend and a blueberry. The blueberry had the Arc knight and decided to bring him to near death right away. When we got swarmed by the cursed thralls, they blew up his knight. He backed out and blamed us.