The Qiraji Prophet Skeram is an important religious leader in Ahn'Qiraj. He wrote the Prophecy of C'Thun.
Attacks:
-True Fufillment, which Mind Controls a target, and gives them increased damage, higher resistances, faster movement and instant-cast spells. The target also grows to an immense size, so it is easy to see who is being controlled. The effect cannot be dispelled. Have your mages sheep them immediately.
-Create image. At 75%, 50%, and 25%, creates two images that have identical abilities to Skeram. The images spawn with the same percentage of life as Skeram, but they take more damage than the true Prophet.
-Arcane Explosion (1.5K, large radius). It can be interrupted.
-Earth Shock (2.5K), he casts this continuously on random targets when he is not being tanked.
-Blinks to either platform beside him, clearing aggro.
Strategy:
For this fight, 5 of each class would be recommended, and at least 3 warriors geared as Main Tanks. Ideally, a feral druid with tanking gear would also be available - feral charge can be useful if Skeram teleports, or if one of his copies get away. The druid can act as an off-tank to bring Skeram back to the warriors or to substitute as a Main Tank.
Skeram's abilities include a teleport. He seems to most often teleport to one of the three platforms near where he starts. Skeram also has the ability to split himself into 3 copies - hence the 3 Main Tanks. Each Prophet will do a large range arcane AoE attack when more than 4 people are within melee range. The AoE damage is small enough that it should be able to be easily healed.
Note - When he splits he can have 3 on 1 side, have 2 tanks on each side (Middle left and right). Be sure to focus on images first rather than Skeram as they do similar damage. He will spam Earthshock when not tanked and had aggro from a range DPS and this will probably kill them. Other than that it is not that hard to perfect, but Polymorphing needs to be done fast.
All of the ranged DPS/healers should head to the top of the steps. Mages should be placed along both sides of the steps to IMMEDIATELY polymorph anyone that gets mind controlled. As skeram teleports he wipes most of his agro, so the melee group that he teleports to should Taunt, tank, and DPS him, while the other melee groups stay where they are. When he hits 75,50, and 25 % he makes 2 copies of himselves. They will initially spread out to the 3 positions the melees are placed at (left, middle,right). Quickly determine which ones the copies are (Real one will have a raid marker), and have all ranged DPS concenrate on them, one at a time. The 2 copies have ALL the abilities of the regular ones, so you have to kill them very fast. A bit after the copies are made, they will start teleporting around, and 2 will end up in the same location. It would be best to have a warrior taunt and pull one back to the middle. TRY TO ALWAYS HAVE LESS THAN 5 PEOPLE IN MELEE RANGE AND YOU WILL AVOID THE AE ARCANE EXPLOSION COMPLETELY, So stay on the platform asigned to you. Melee dps will be split in 3 groups of 4 (5th beeing paladin) excess melee will have to wait w/ ranged dps till one of the other melee bites it.
Added Notes:
Repops on the initial mobs are pretty quick (25-30 min), so you need to watch for respawns should you wipe en route to the first boss.