The Crypt of T'Haen: Vengeance

==Notes==
* Bloodline Chronicles adventure pack required, but only one needs to have gotten access.
* Boss Mob: T'Haen the Lost
Zone in and run around the bottom of the water area killing three named that pop next to orbs that you need to click after they die. After that, run up the pillar to the hound area on the second floor and kill a named there in order to click the 4th orb. 
With the orbs turned off, the wall of magic opens and you can run to the top to kill T'Haen. Invis is your friend here, so tell everyone to bring totems.
Once up top, kill the trash to clear the area. When you get close to the boss, T'Rath the Usurper will die instantly and T'Haen will become attackable, although some bats will spawn on top of you that need to be taken care of first.
Now once you start in on the named boss, Max DPS him. Do not stop for anything as you will get crazy adds. Just have the tanks AE taunt them and hold aggro but do not kill them, keep working on the boss. If you do not kill the boss in 45 seconds or so he will begin to spawn copies of himself. It starts with 3 and multiplies fast. At 95 seconds you can have the boss and as many as 15 adds just like him.
He also has an AE knockback, but it throws you about two feet at the most, so it's nothing to worry about unless you're standing at the edge of the platform.