Hakkar the Soulflayer

[Bastet]

Gather around Hakkar loosely. Let healers stand back near the stairs. You need 2 people tanking Hakkar. One of them will be mindcontrolled from time to time. Just let him run around and hit you and don't bother sheeping or stunning him. Every 90seconds Hakkar uses his lifetap/bloodtap on everyone, which heals him if anyone does not have the poison from a Son of Hakkar. So make sure to kill a son just in time and let everyone get the poison. Usually you pull a son and sheep him, then kill him 20secs before the next lifetap. That's it.

Attacks
Hakkar uses a curse called Corrupted Blood, which temporarily caused an outbreak on certain servers. This was fixed in the 1.8 patch.
The surrounding priests grant him abilities if they are not killed:

Jeklik - 1200-2000 AoE damage + 8s silence.
Venoxis - 800 damage poison to the raid.
Mar'li - 6 second stun and complete aggro reset.
Thekal - Enrages, increasing attack speed by 150%.
Arlokk - 2 second Gouge (aggro wipes the main tank)
Hakkar has never been beaten with all 5 aspects active.