I will update this to keep it up to date with changes from both the PTR and live servers. The strategy that I post is what my guild/group used to kill the boss on PTR or live. If you have a more efficient suggestion please post to let me know.
Countless ages ago, Warlord Zon'ozz and his soldiers waged endless war against the forces of C'Thun and Yogg-Saron. Millennia have passed by the warlord still serves the chaotic might of the Old God N'Zoth. Deathwing has now unleashed this legendary faceless one to crush the defenders of Wyrmrest Temple.
Warlord Zon'ozz increasing focuses his anger and rage, increasing Physical damage done by 20% and his attack speed by 5%. This effect stacks.
Warlord Zon'ozz channels a wave of psychic force in a 30 degree cone in front of himself, inflicting 140,000 Shadow damage and leeching life for ten times the amount damage dealt.
Warlord Zon'ozz covers random players with Disrupting Shadows. The effect inflicts 36,000 Shadow damage every 2 seconds. The shadows also knockback the targeted player if the effect is dispelled.
Knock backs all players within 10 yards
Void of the Unmaking
Warlord Zon'ozz summons a Void of the Unmaking. This void travels forward until it encounters a soul to absorb.
When the Void Collides with a player it diffuses, inflicting 180,001/540,001 Shadow Damage split evenly between nearby players. The force of this diffusion causes the void to richocet in the opposite direction (reflect), and the absorbed souls increased the damage the Void inflicts by 20% pre diffusion.
When the Void collides with Warlord Zon'ozz, it inflicts a distracting shock to him. The Void Diffusion increases the damage Zon'ozz takes by 5% for every time the Void of the Unmaking bounces between players. This collision enrages Warlord Zon'ozz, causing him to awaken the Maw of Go'rath and lose his Focused Anger.
Black Blood of Go'rath
Warlord Zon'ozz inflicts 10,000 Shadow Damage every 1 second to all players for 30 seconds.
When the Maw of Go'rath opens and adds spawn
In Heroic Difficulty each tentacle of Go'rath inflicts 3,000 Shadow damage every 2 seconds to all nearby enemies. The damage is multiplied by the number of tentacles alive.
Claw of Go'rath
-Oooze Spit: when not tanked the Claw of Go'rath spits ooze at a random player, inflicting 100,000 Shadow damage to the target and any allies within 4 yards
Eye of Go'rath
-The Eye of Go'rath casts its Shadowy Gaze at a random player, inflicting 30,000 Shadow damage.
Flail of Go'rath
-Wild Flail: The flail of Go'rath whips about wildly inflicting 15,500 Physical damage and knocking back nearby units within 15 yards.
-Sludge Spew: The Flail of Go'rath spews sludge at a random player, inflicting 45,000 Shadow Damage