Originally Posted by
Lora Twinblade
Dungeons that are extra dangerous that I can remember at the top of my head is the second Strathholme (the one with the Ziggurats), extremely crowded with mobs, the Ghouls hit really hard and they can both root and silence your healer. The first pull after the second gate (before you've dealt with any of the bosses) is the most dangerous pull because there's sooo many mobs.
Dire Maul, all of them really, especially the Ogres with two handed axes, think they are called reavers or something. One of the bosses is extra hilarious, he aoe fears the group, summons 2 or more reavers whilst hitting you in your back for a lot of damage... Don't think we ever killed that boss without anyone dying.
Hellfire Ramparts, especially the first pulls, they hit really hard, they have kidney shot stuns and disarm, be careful...
Mana tombs and similar dungeons, they have mind control, silence the healer, easy to overpull. Also they spawn ghosts that hit for 90 % of the healer's health per hit and are impossible to taunt or otherwise gain threat on...