WoTLK Azjol-nerub Boss Strats

Krik'thir the Gatewatcher

There are three sets of adds in front of Krik'thir. The order in which you pull them doesn't matter. Make sure to either crowd control the Skirmishers or kill them first as they can Backstab for some pretty nasty damage. Your party will drop combat after each set of adds so there is some time to drink and heal up. Krik'thir will either run at your party by himself or he can be pulled depending on whether your group is ready or not. Pull him to the center of the room and try to keep the group close together. Krik'thir will summon Skittering Swarmers that will come out of the walls towards your group. They have very low health and can be killed easily. He will also cast Curse of Fatigue on a party member from time to time. This slows down movement, attack, and casting speed and also deals shadow damage. It can be removed like any normal curse. at 20%, Krik'thir will Frenzy, increasing his attack speed. Continue to dps him down and kill all the Swarmers that come out.

Hadronox

Hadronox will start at the bottom of the room and slowly work her way up the tunnel. Once you get to the bottom of the ramp, there will be a set of three mobs in front of you. It is very important not to run too close to the two staircases in this room as mobs will constantly be flowing down them towards Hadronox. Once you pull the first group of mobs, a short gauntlet will trigger. After the mobs die, two more groups will come down the stairs and sit at the bottom of them. Keep your party at the ramp with the healer and any casters standing away as the adds will silence from time to time. Kill the two groups of mobs and make sure to pick up any of the extra non-elite adds that will come down the stairs towards your party. Make sure to stay back against the wall once Hadronox comes into the room. Do not attempt to engage her before she has killed all the other mobs as she heals for 10% everytime she kills something and yes, that includes a party member. Once all the adds have died, Hadronox will come at your party. It is crucial that you have someone in the group that can cure poisons. She casts Leech Poison which drains health and returns it to her and if that person dies with the poison on, she will heal for 10% of her life. She also casts Acid Clouds on the ground that deal quite a bit of damage and do not despawn for around two minutes. Make sure to not stand in them as they are easily avoidable. She also casts Web Grab which pulls everyone in the party to her. When this happens, have the ranged and healers spread back out.

Anub'arak

Make sure to tank Anub'arak facing away from the party as he can cast Pound, which does roughly 10k damage in a frontal cone to all targets. He will also cast Locust Swarm that causes damage to all party members so be sure to have the healer top everyone off when he begins casting this. After some time, Anub'arak will tunnel into the floor and disappear. Several mobs will fly down from the ceiling, others will tunnel out of the ground or come down the ramp towards the group. Be sure to pick them up when possible. Make sure to kill these before Anub'arak comes back. While he is gone, you will notice dust rise up from the ground and shortly thereafter, spikes will fire up out of it. All party members should avoid these as they cause around 3k damage and knock anyone standing on it up into the air. Once Anub'arak comes back to the surface, continue to face him away from the rest of the party. He will tunnel down again and when he does, remember to pick up any adds that will come during this phase. Anub'arak has the ability to summon Carrion Beetles while he is on the surface. These have low health and can be picked off quickly so the tank should continue concentrating on keeping the boss facing away from the party while dps kills the beetles.

Taken from mmo-champion.com