I sympathize with OP.
All I can recommend: Bring a paragon for protection or for damage buffs;
A mesmer hero might help, too.
Learn the names of the demons and the professions: then drop monks (Word of Madness, I believe?), Eles, (Rain of Terror) first... (at least, that's usually what I do).
Edits here: Jahai isn't awful. Move slowly, and as you work up that first rise from the outpost, several patrols WILL come together, so I recommend flagging heroes well back, and then going and pulling each mob back to your group.
If you stay relatively close to that right-hand side, and don't take many off-track paths, you can do OK.
I learned this the hard way: ONE QUEST AT A TIME.
Adding multiple quests (at the same time) in the Gate of Torment seems to add several mobs in the area...mobs that overlap, include bosses, and love to eat you and your heroes alive. So I recommend dropping all but your primary quest--or whatever quest you want--and then going again.
Good luck.
e


