Anub'Rekhan: Arachnid Wing

[taallonn]

* Anub'Rekhan has approximately 2,230,000 hit points.

Anub'Rekhan

*
Impale: This is an area of effect ability that targets a random player and hits everyone in a straight line between Anub'Rekhan and the player. It will do 4813 to 6187 Physical damage and launch the affected players high in the air, causing 50% fall damage when they hit the ground.

*
Locust Swarm: Every 70-120 seconds, Anub'Rekhan casts a spell that causes AoE damage in a wide radius (30 yards) around him (the AoE remains centered on Anub'Rekhan as he moves), he will also slow to 75% of normal run speed. Remaining in the radius of effect will cause a DoT debuff to stack repeatedly dealing 875 to 1125 Nature damage every 2 seconds per stack as well as silencing those afflicted. When he casts this spell, a Crypt Guard will also spawn at his initial engage point. Lasts 16 seconds.

NOTE: The Locust Swarm attack has an approximately 90 second cooldown, however the first cast is not at a set time, between 80 seconds and 2 minutes. As well, the Locust Swarm is not a normal silence. Unlike a normal silence, it prevents the use of all abilities (even auto-attack). This means that the MT cannot use Shield Wall or Last Stand to save himself if he gets stacked too high. Items, however, are still able to be used.

EXTRA NOTE: Aspect of the Pack can be used to get out of the Locust Swarm range but needs good timing from both Main Tank and Hunter. Unholy Aura will also work if the Death Knight stands a little further ahead of the kiting path and runs with the Main tank to the initial tanking place. If you're late on your kiting and start stacking up the debuff, drink a swiftness potion.

*
Summon Corpse Scarabs: Whenever there is a corpse in the room (either a player or a Crypt Guard) Anub'Rekhan may decide to spawn corpse scarabs from it. This is not on a set timer. Ten will be spawned from a Crypt Guard and Five from a player. They spawn with threat on random players and will spread out and attack random targets.

Crypt Guards

These adds will spawn after every Locust Swarm, they have around 300,000 health. They have a cleave, a stacking acid spit dot that ticks for 500 a stack, an area of effect immobilizing web and a low HP frenzy.

[taallonn]

Three tanks are ideal for this encounter though it is doable with two. One of them should tank Anub'Rekhan, while the others will tank the Crypt Guard adds and the Scarabs that spawn from their corpses (in the 10-man encounter the two Crypt Guards are not present at the start of the fight, so a third tank is entirely unnecessary). A protection paladin is best suited to add duty, with their good AOE and snap threat, while a warrior or druid is best suited to Main Tanking, as they are able to charge back to the boss if impaled (although a warrior also has Intervene, making them slightly preferable, the boss was done without intervene prior to patch 2.0 by running round the circle, and this is still achievable, particularly in the 10-man). A hunter is helpful but unnecessary.

The warrior tank will engage Anub'Rekhan and drag him back to where he was standing originally (note that tanking him against the wall can cause evade bugs should the tank be impaled). In the 25-man fight, the other tanks will pick up their Crypt Guards and DPS will focus them down. These should be tanked and killed relatively close to Anub'Rekhan. Due to the acid dot the Crypt Guards apply infinitely these should be killed quickly.

After this the raid should spread out in a semi circle around Anub'Rekhan to minimize the effects of impale. Mages should be ready near the Crypt Guard corpses to frost nova the Corpse Scarabs as they come out and the offtanks can help pick them up (the offtanks should also be on or near the corpses). Ranged DPS should focus and kill the scarabs before returning to Anub'Rekhan. You should have a decent amount of time to DPS Anub'Rekhan before the first Locust Swarm. One player, ideally a Hunter, and a healer will stand 30 yards from the warrior tank on the edge of the room past the ring of slime. When Locust Swarm is cast all players must immediately run from Anub'Rekhan for the other side of the room and remain more than 30 yards from him for the next 20 seconds.

The warrior tank, when he sees the Locust Swarm cast bar, must immediately intervene to the hunter and begin kiting Anub'Rekhan along the edge of the slime to the other side of the room. The hunter should have aspect of the pack on. The healer will need to move with them and avoid getting any stacks of Locust Swarm in order to be able to heal the tank and hunter should they be hit. Locust Swarm will end when Anub'Rekhan reaches the other side of the room where he should be tanked as before with the raid spreading out in a half circle. During this time another Crypt Guard will spawn which should be picked up and killed. Mages will need to be aware of Corpse Scarabs spawning from it. After this the encounter continues with Locust Swarms coming every ~90 seconds until Anub'Rekhan is dead.

If a warrior tank is not used, some form of speed boost is preferable (boot speed enchant, engineering, travelform or cat form on a druid), although since the boss moves at lower than normal runspeed, this is not strictly necessary.

---------------------ALTERNATE STRAT -----------------------------------------------------------
The kiting strategy can be really hard to master for a group with low coordination. Ranged DPS might get caught in the swarm trying to kill the adds when the tank kites, and cause everything to go wrong. The strategy here is to not kite at all. The tank needs to stay put and take the full damage of the swarm while the healers spam heals on him. This is entirely possible and will make the fight more of a tank and spank with extra healing on the swarm. Death Knights are good tanks for this tactic because they can time their damage reduction ability with the swarm and take less damage. Tanks simply have to make sure that they use their damage reduction ability before the swarm because it silences them.

Upon initiating the fight, pull the boss at the entrance and tank it there. All ranged DPS should spread around like usual to avoid the impale. The offtank can add some dps to the party but needs to make sure that he stays ready to pick up the adds that will spawn in the back. You can do this with tanking the boss at his usual spot, but this tactic is really to reduce any kind of confusion so separating the boss and the adds makes the fight simple. Pull back the adds in the middle near your mage and aoe so they can be ready for the extra adds coming from the corpse.

Remember that the tank will take massive damage at the end of the swarm so extra healing from a third or fourth healer is always good to have.

Note: The adds do not hit the Offtank really hard, but with a low dps group, the damage debuff can stack and be really painful. A nice way to prevent extra damage is to stun. When you stun the elite adds their debuffs won't be cast at all; these debuffs last for 10 seconds and are reapplied every 2 seconds, so if u can cast a stun (e.g. Hmmer Of Justice) when your tank has 8 seconds left on the debuff, and add one more at 2 seconds, the debuff will start to 0 again, largely reducing the damage taken. The Goal is to have a chain stun ready when the elite is around 50% health to reduce the overall damage taken. The adds are undead so the paladin undead aoe stun can work for 1 sec.

Extra Note: The small adds that spawn from the corpse are really fast and they can get out of a consecrate.