Raid Setup

Tanks: 5 (A mix of protection and fury warriors and feral druids)
Healers: 8
DPS : 12

Some of the "tanks" can be DPS specced and change from tanking gear to DPS gear at the end of the waves.

Buffs, Potions and Gear

Shadow Protection buff and Medallion of Karabor are good to help resist the Howl of Azgalor ability, especially for healers.

Boss Abilities

HP - 4,200,000
Melee Strength - 7-8k on plate

Cleave

Azgalor's frontal cleave hits for 10,000.

Rain of Fire

Much like the warlock's Rain of Fire, it rains fire in a 20 yard area, dealing 1619-1881 fire damage every 2 seconds for 10 seconds and applying an undispellable debuff called Unquenchable Flames that deals 1250 fire damage every second for 5 seconds. Can be avoided with Divine Shield / Ice Block / Cloak of Shadows. Used very randomly.

Howl of Azgalor

An AoE silence with a 99 yard radius, that lasts 5 seconds. Used at the very start of the encounter and on a 15-20 second timer after that. Can be avoided with Ice Block / Divine Shield.

Doom

Cast every 45-50 seconds on a random target, it places a debuff on them called Doom, which after 20 seconds will kill the target. When the target dies, it will spawn a Lesser Doomguard with 62,000 HP on the spot of the dead player, which must be tanked. The ability is not used on the main tank and cannot be removed or avoided in any way by any immunity.

The Mobs

All mobs can be stunned and feared. Undead can be Shackled and Turned, demons can be feared/Banished. Shadowy Necromancers can be Mind Controlled/sheeped.

Abominations

HP - 180,000
Melee Strength - About 3k on plate.

Poison Aura - Sometimes the Abomination will use a poison cloud-like ability, dealing roughly 750 damage to everyone around the Abomination every 3 seconds.

Shackle-able / Fear-able/ Trap-able

Ghouls

HP - 140,000
Melee Strength - About 1.5k on plate.

Cannibalise - When they go low on health, the ghouls will run to a corpse and start cannibalizing it, restoring about 7% of their health every 2 seconds, for 10 seconds.

If you see a ghoul cannibalizing, you must stun it or Shackle it or even fear it as fast as you can to prevent it restoring health. A cannibalizing ghoul takes an entire raid's worth of DPS to kill.

Shackle-able / Fear-able/ Trap-able

Shadowy Necromancers

HP - 120,000

Unholy Frenzy - Increases an ally's attack speed by 100% for 20 sec, but also inflicts 500 nature damage to that ally every 2 sec.

Shadow Bolt - A bolt of shadow dealing 2250-2750 to the current target.

Cripple - Increases the time between an enemy's attacks by 100% and decreases movement speed by 50%, in addition to reducing its strength by 50%. Lasts 15 sec. Can be dispelled.

Summon Skeletons - Summon a skeleton from a nearby corpse. They can be either a Skeleton Invader, with 32k HP, or a Skeleton Mage with 24k HP. One is a melee type, the other one is a caster. They are no real threat, just an irritation.

Sheep-able / Fear-able / Trap-able

Banshee

HP - 83,000

Banshee Curse - Reduces chance to hit by 66% for 5 min. Decurseable.

Banshee Wail - Much like a Shadow Bolt, it causes 2475 to 3025 to the current target.

Anti-Magic Shell - Creates an anti-magic shield around the caster, absorbing up to 200,000 magic damage for 30 seconds. Can be pruged.