Phase 1: Gormok

Tanks will be taking as few impales as possible, switching after 2-4 stacks depending on how well geared the particular tank is. We find that having the highest mitigation tank go first, the second highest mitigation tank go second, and then of course the third tank taunt after that. As the snobolds drop from Gormok's back his damage goes up. So as the tanks start taking greater and greater damage, start using Tank and Healer Cooldowns just before the impales and begin using Paladin Hand of Protections to get rid of stacks of Impales. We start rotating cooldowns when his rising anger reaches 4(the buff he gets as the Snobolds drop.) This is especially critical on the last tank to take any impales before the worms become active.

Ranged and Healers should spread out as much as possible to prevent fires from being too dangerous. As the Snobolds drop from Gormok's back onto people in the raid, the ranged and possibly select melee (I find warriors strong choices) should switch to kill the Snobolds. Prioritize Snobolds on Healers, then Ranged, then Melee and Tanks last.

DPS should be strong enough to defeat Gormok before the worms become target-able.

Phase 2: Acidmaw and Dreadscale

One tank assigned to Acidmaw, One tank assigned to Dreadscale, and one tank who will help with whichever worm is mobile (Dreadscale to start).
All DPS on Acidmaw.
When the Dreadscale tank gets hit with burning bile the other tank with him taunts, and the Burning Bile tank runs towards the raid in between the worms, and then stops. Anyone who got hit with poison can easily get to him before their poison timer is up. If the melee or Acidmaw tank gets hit, then the Burning Bile tank simply runs over and frees them without the poisoned targets having to move. After clearing the poison he goes back to Dreadscale.

When they submerge and re-emerge the Acidmaw tank will establish aggro, and we use Bloodlust / Heroism here. The Acidmaw tank will make sure the boss is facing away from the raid, and slowly follow the contours of the room in either a clockwise or counter clockwise fashion. Be wary of Burning Bile hits on groups here. The first tank on Acidmaw will get hit with poison early, and no one will have burning bile, so the second tank picks up Acidmaw and continues kiting him. As soon as someone gets burning bile they should free the poisoned tank.

Acidmaw should either die now or die after the next emerge.

While Dreadscale is alone and rooted it is imperative that people do not group up, and that the melee stay in as small of stacks as possible. If they get burning bile they should immediately move away from anyone else and stand on their own. Whomever is tanking Dreadscale should try to use CDs to help with the damage coming in, and tanks should switch aggro and use available CDs here. If DPS values are close to our own then you will see Dreadscale mobile after Acidmaw dies, then Dreadscale will submerge and re-emerge and be rooted until he dies. Keep an eye on the timer, if need be make sure an extra tank is available to pick up Icehowl for phase 3. Dreadscale should die either before or within 15 seconds of Icehowl becoming active.

Phase 3: Icehowl

This phase we tank Icehowl near the wall, facing the center so that melee get knocked back into the wall. If we can spare a tank we'll have a tank standing out of his knockback who will then taunt when the boss does the knockback for easy re-positioning.

10 seconds before Massive Crash we call out for people to identify where they will get hit too on the wall. This way people can prevent themselves from getting knocked into doorways or other similar obstructions. From here it is a matter of avoiding his charges and getting strong DPS in. If you have gotten this far and still have the majority of your raid up you will kill him easily before the enrage as long as no one gets hit. If someone does get run over, don't panic, have a tank with Cooldowns (their own and healers) taunt the boss, have a hunter tranq shot him, and melee wait to go in till after he has calmed down. If this happens once, then you will likely run up very close or over the enrage timer (especially as you are likely to have DPS down).

If the enrage timer is coming up, don't just give up. If his enrage activates before he activates Massive Crash, he will one shot everyone who doesn't use immunity cooldowns. But those that do might still be able to carry the boss over when he crashes into the wall. And if he enrages AFTER he knocks everyone back, then you have a very good chance of taking him down if he hits the wall, as you will have some strong DPS time before he begins killing people.