I finally did #2 boss, just stacked my team against the pillar on top of the second level of stairs on the left. Tanked in the middle...

Keys to the fight...

- watch the boss casting bar and spam taunt when he's about to breath, mentioned before on this thread... very good tip, makes a big difference
- avoid the tornadoes on your tank!! lol, sounds easy, but it makes it way easier if you can do this.

Thanks for all the tips... gonna try the final boss tonight... ran out of time last night, but got some practice in on the 5-packs (with the dual healers)