Looks neat, don't know boss mechanics though.
EDIT: Tried it out in a pug, he has a couple of ability's.
He does [Eyes of Occu'thar] every ~30 seconds, attaching eyes to players. If you destroy the eyes, he'll take more damage I think from what I've heard (Like he's now blinded). If you don't destroy them, they'll explode after 10 seconds, dealing 25k damage to the whole raid. Not sure if that damage is per eye or not, but probably is.
He also puts a void zone on the ground every ~15 seconds that deals shadow / fire dmg on the ground, so players gotta avoid that.
He also seems to have a '[Searing Shadows]' ability that will most likely require a tank swap. (Like Sindragosa swapping, tank runs into tank spot and taunt, and tank with debuff runs to the dps spot)
That's all I know ATM.