Some more for Vulak's...
Getiar Razorwing hits smaller but very fast, just chained temps and didn't have any trouble staying alive. He casts Winged Death which pulls your tank behind him, just move back into position. Glacier Smash looked like it was the same mechanic as Neragul's aoe in halls, whole group can't do anything until a mage cures it or cures a priest who cures it. Just don't fall into the water (there are some puddles on the right side of the platform, stick to the center and left) and tank and spank him.
Geradin the Grotesque hits reasonably hard, not enough to one shot my tank. If anyone dies during the fight he'll spawn an add, but it's pretty hard to die honestly. At the start he'll curse everyone with a det that ticks aoe damage every few seconds, it didn't seem to do much. My healers cured two people automatically and I didn't notice the groups health wavering at all from it. At 50% he'll split into two mobs, his mount and himself. Geradin ports away from you and just shoots you with his bow, Jhul Vespan is his mount who stays put and attacks you. For the rest of the fight Geradin will red text that he's targetting someone, that person gets a no-change-target det that lasts a good while. It hit my tank on our first pull and really sucked waiting it out. Anyway, the mount has crap for hp, it dies in a few seconds. After it dies Geradin comes back, just tank and spank him. He didn't seem to hit any harder the second time, nor have any more hp, just the annoying force target issue.
Didn't get very far on Ahmatal the Scorcher. Some kind of aoe blind followed by a red text about not being able to see an attack coming. It didn't register any damage in ACT, so dunno what that's about. His auto attacks just fuckin' hurt. My tank is a bruiser and it's easy enough to survive the first 30sec or so with avoidance temps, but when I'm forced to use Brawler's Tenacity he eats all 3 triggers in about 10sec (even with DG & Draconic Shout increasing my hp, rockskin and a 25% damage reduction clicky, ouch!). Will work on him a bit more, but I suspect further gearing up will help, and high dps is a must.