Sulfuron Harbinger

Sulfuron's Attacks:

Demoralizing Shout: This is an AoE attack which reduces attack power by 300. There is no counterspell for it.

Flame Spear: This ranged attack has a 45 yard range and a two second cooldown. It does 850-1150 damage to the primary target and some collateral damage to players in the immediate vicinity.

Fist of Ragnaros: This AoE stun attack is cast frequently, but has a short duration. In an attempt to get away from the MT, he moves away and starts throwing spears. Counter the attack by immediately moving up to him and resuming melee attacks.

Inspire: This is Sulfuron's self buff, and cannot be dispelled. It doubles his attack speed and increases his damage by 25 percent.

Flamewalker Priest Attacks:

Immolate: This is an instant cast DOT which does 760-840 points of fire damage, with an additional 380-420 every three seconds for the next 21 seconds.

Dark Mending: This is a healing spell which heals the target for 27,750-32,250. It has a 60 yard range and has a cast time of two seconds, which means it can be interrupted.

Dark Strike: This is a Shadow Damage attack. It deals 570-630 melee damage to the next successful melee attack.

Shadow Ward: Pain: This is a DOT attack which does 440 Shadow damage every three seconds for 21 seconds.

Sulfuron is a Flamewalker, attended by four Flamewalker Priests. The priests heal each other and must be pulled and separated until they are dead.

Send the MT party to the NW part of the cavern. Position the rest of the raid group to the SE. Assign a tank to each of the Priests, while the MT targets Sulfuron and drags him to the MT tank party. The four Off Tanks drag their priests south and east, keeping them separated so that they can't heal each other. The majority of the party will attack the Priest at the end of the line, kill him, and wait for the next tank to drag his Priest to them. This is repeated until all four Priests are dead. At this point the whole party moves on to Sulfuron, and kills him.

Warriors and Rogues can use Shield Bash and Kick to interrupt spells that the Priests are attempting to cast.

The Bosses:
Lucifron
Magmadar
Gehennas
Garr
Baron Geddon
Shazzrah
Golemagg the Incinerator
Sulfuron Harbinger
Majordomo Executus
Ragnaros