I don't know about others, but I found this to be nearly impossible to complete with human players around my lvl (lvl 9). Its easy, until the last boss, who easilly out-heals henchy/hero monks, and does a lot of high-damage attacks. Problem is that I can never find a human monk for healing or a mesmer to help shut-down the boss (yes...you people reading this... Mesmers are important in PvE!) I am playing a Derv.
If you own Proph and/or Factions, or you PvP, you probably have some other elites to put on your heros. I recomend putting Grenth's Balance on your hero Derv (you have to take her to this mission), and Signet of Midnight on another Hero (probably your monk, or put it on warrior, but I prefer to take the monk). Both these elites are stat-independant. With these two skills, that boss (Acrogipneca or something like that...you can see from this post that I don't remember any character's names )goes down in like 10 seconds with this setup. He gets shut down and suffers massive damage.
Just writing this to help those that may have trouble with this mission.
o
