I wanted to contribute everything we learned about this fight tonight. I apologize if I repeat anything that was in the video or posted already.
Our raid setup for 10-man was:
2 Holy Pallies, Holy Priest, Hunter, Boomkin, Ret Pally, DK, 2 Prot Warriors, Enhancement Shaman.
Since we had 5 ranged and they were placed on the diamonds one square into the room. One person per diamond. This made it so the person could tell who was getting laser eyes and then that persn would turn and run out of the room and down the stairs until the eyes stopped focusing. Then they would return to their spot.
MT/Melee were on Kologarn in front of his chest. Melee must face his chest in order to DPS the arms.
When Elementals spawned the OT would grab them and tank them to the left of the right arm.
We used the strategy mentioned in the video. Take out the right arm any time it's up, else work on Kologarn.
To go into details:
Healers: 2 Healers focused on MT with one healer focusing on Raid after shockwaves. Healers did need good situational awareness in case one healer has to run away from eye or gets grabbed. If laser eyes ever focused a healer they would run out the room and down the stairs.
Ranged DPS: Stood on their diamond and DPSed the arm until dead. Once dead, they would AOE the rock elementals. Once all elementals are dead, they would DPS Kologarn until arm respawned. If they were ever the target of laser eyes, they would run out of the room until it stopped.
Melee DPS: Stood still and DPSed are or DPSed Kologarn. Melee did not have to move at all. Just faced his chest and changed targets as needed.
Tanks: Both tanks stood in front of Kologarn and switched aggro by taunting if 2 armor debuffs were put on a tank. When arm died and rock elementals came out, whichever tank is not tanking picked up the adds. They were tanked away from the melee. During this time the Add tank has to watch out for being focused by eyes. Tanks did not switch aggro on Kologarn until all the adds were dead. With two healers focusing on the Kologarn tank it is possible to have 2 debuffs and live, cooldowns also helped.
Things to NOT do:
1) We had several issues with running left/right to avoid eye beams. It seems that the beams would constantly hit, so only running backwards was 100% ok.
2) Tank should never taunt Kologarn if not in melee range. Accidentally hit AOE taunt while tanking adds and it aggroed the boss. Since the tank is not in melee range he will do Petrify breath. Basically, whoever has aggro must be in his melee range.
3) Do not try to put casters in Kologarn's melee range, he interrupt casting.
4) Do not stack multiple people on the same ranged spot. This will lead to confusion as to who the eye beam is coming for.
2 Tanks, 3 Healers, 5 DPS worked best for us. Ranged were spread out in a line and if they got eye beams they would run out of the room. Melee DPS does not move and just have to switch targets while facing Kologarn's Chest. Ranged AOEs adds when they come out. Tanks rotate boss after 2 debuffs unless OT is tanking adds, then MT just pops a cooldown until adds are dead, then the switch.
I hope I help someone with this and I hope everyone who tries this fight has a blast. Enjoy everyone.