Dungeon Help
In general, you need to make sure you have at least one, if not two, people running support builds in a dungeon. If everyone is only relying on their own self-heals, you will die quickly. Having at least one person run control (knockdown, daze, immobilize, etc) is also really good because it cuts down on the damage output of the enemies. I love running warrior mace plus sword offhand because that gives me two blocking skills that I can use in addition to my dodging to avoid incoming damage, plus mace allows me to daze.
I’ve also found that unless everyone traits into toughness or vitality at least a little bit, you will be really squishy and die quickly. Have everyone (even DPS) bring a ranged weapon in addition to any melee weapons they might have. Sometimes enemies hit really hard up close, but if you can kite them and shoot them from afar, you can get them down after a while. Make sure you are moving around a lot and using your dodge skills wisely – watch for those big attack animations and save your dodges for that. In some fights it helps to use the environment to get out of line of sight so your enemy can’t hit you. Finally, make sure you are resing each other when you go down, or you’re asking for a wipe.
Good luck!