Heroic Garothi Worldbreaker

Tank

• Taunt when your co-tank is afflicted with Fel Bombardment
• Run away from the boss when afflicted with Fel Bombardment. This creates distance to allow you to avoid the incoming missiles.
• Always have one tank within melee range of the boss to prevent Carnage from being cast.

Healer

• Stand inside Annihilation zones to soak the hit and prevent raid wide damage.
• Place Decimation debuffs at the edge of the room, away from the tanks Fel Bombardment running path.
• Keep players topped up during Apocalypse Drive.
• Run away to the back of the room at the end of Apocalypse Drive when Eradication is cast.
• When Decimation is empowered, stack under the boss and move between two preset locations each time the circles appear.

Damage

• Stand inside Annihilation zones to soak the hit and prevent raid wide damage.
• Place Decimation debuffs at the edge of the room, away from the tanks Fel Bombardment running path.
• Kill the Annihilator during the first Apocalypse Drive & the Decimator during the second Apocalypse Drive.
• Run away to the back of the room at the end of Apocalypse Drive when Eradication is cast.
• When Decimation is empowered, stack under the boss and move between two preset locations each time the circles appear.

Source: Garothi Worldbreaker Antorus Raid Strategy Guide - Guides - Wowhead