I agree with camping the king. Ive done this mission about a dozen times. The first few times it was kinda tough with PuGs camping the doors and whatnot. Then when I brought my monk through I went with a PuG where I was the only healer and we only had 1 warrior. We decided to camp the king, since it would be tough to camp the two doors with that group, and we made it through the mission on the first attempt with no deaths.
Since then Ive always just camped the king. Ran it last night with 2 other guildies and 5 henchmen and it was a breeze.