Anubisath Sentinels are packs of 4 mobs inside Ahn'Qiraj. They have a normal attack as well as one of the following abilities:
[Mending] aka 
[Renew] (Heals 4.5K every 3 seconds) (Use 
[Mortal Strike])- [Mortal Strike]
[Mana Burn]- Multiple target Shadowbolt (Likely the worst)
- Knockback and Immune to Taunt
- [Thorns] (500 nature damage) (A hunter's [Aspect of the Wild] helps resisting it)
- Thunderclap (no debuffs though, 800 nature damage) (A hunter's [Aspect of the Wild] helps resisting it)
- Reflect Fire and Arcane Damage (You can tell since it bounces back detect magic)
- Reflect Frost and Shadow Damage
When any one sentinel dies, the remaining sentinels gain the ability of the fallen sentinel and are healed for 50% of their max health. This means the last sentinel will have 4 abilities. Use detect magic as you pull the sentinels so that the most appopriate first target can be selected.
Reputation
- 100 Brood of Nozdurmu Reputation per kill.
Priority
You must prioritize which abilities will be the worst to have on more than one of the sentinels.
- Typically any of them that AoE are ones you don't want to kill early.
First priority on killing should be either knockback or ones that heal. Mortal strike is pretty mana intensive to heal through on multiple tanks, but in the case of multiple AoE sentinels, this should be killed earlier rather than later. The shadowbolt volley is avoidable if you stand in melee range, so as long as you don't have a mana burn or thunderclap stacked with it, it is easy to deal with if you spread out the mobs so you are either in melee or out of range of the volley. Thunderclap is not difficult if you spread out the sentinels, but if they become stacked on top of each other, it is a raid wiper.
Respawn
The pack of Anubisath Sentinels will respawn 30 minutes after the last one of the pack was killed.