This has being our brick wall, like 2-3 days of wipping in this guy in 25m, we tried several ways, splitting raid in 4, 3 and finally 2 is the best way, left and right, after losing tanks by WW of sentinels (hits for 30k on a Naxx25 geared tank), losing ppl to chian lightning of watchers, and 2ble fireball 2 shoting ppl.
Some times we get periods when all the adds are dead and no machines spawn for like 5sec, sometimes we get 5 at the same time, we found that:
1- Sentinels spawn from the mole closer to the circle, the central one (have 1 tank only in sentinel duty)
2- Moles machines spawn zone is higher in between NW and N corner (if you think N is 12o'clock looking the circle from the turrets)
3- Every 2min you can drop the drake down (every 30secs a turret get fixed) then the drake is down for 30secs. Meaning if you don't get him down to 50% in 2 rounds, wipe and try again, more than that is equal to 3 times turrets repair + 3 times 30secs stun = a bit more than 7min with an enrage timer of 8min, so you won't down 50% in a min if you didn't do it before.
** Dont make ppl collapse in small areas, have them think is like KT fight and they must be spread, so the Flame hits less everytime.
Best raid composition so far we've encountered is: 3 tanks (2 OT, 1 Sentinel Tank), 6 healers (good healers) and 16 dps. This fight is a dps race, so using Heroism/BL in the 1st drop is the best choice.
2nd phase is a kite along the circle line w 2 tanks and central DPS/Heals.
Typical fight where 10m is a cake and 25m a pain in the butt (Thaddius much?), for 10's:
The sentinel tank can grab him along w the other adds, just make mele step out and help the other tank while range take him out.
When you are courting a nice girl an hour seems like a second. When you sit on a red-hot cinder a second seems like an hour. That's relativity. - Albert Einstein