The Antorus Raid Quest is now available in the PTR. This quest will unlock access to the raid. Currently, the location where you would zone-in into the raid is blocked by rocks. As soon as you accept the quest, a cutscene is unlocked, showing the Vindicaar ship blasting through rocks to open a way into Antorus. The portal becomes visible after this cutscene, allowing players to zone-in into the raid dungeon.
After completing the quest, Velen provides the next quest which requires you to defeat the World-Soul: “The Death of a Titan.” In addition, I checked the Dungeon Journal. The Argus the Unmaker Overview and story is now available in the Dungeon Journal. Read the Spoiler below.
DAMAGE DEALERS
Move into Gift of teh Sky or Gift of the Sea to gain the power of Golganneth. However, make sure you always move into the same one, as the effects are mutually exclusive!
If you are afflicted by Soulbomb, move to the Avatar of Aggramar to avoid being killed by Soulbomb Detonation.
Collect the Motes of Titanic Power while you are a ghost to empower Khaz'goroth, enabling him to cast Titanforging.
TANKS
Alternate tanks on Argus to minimize Sweeping Scythe damage.
If you are made the Avatar of Aggramar, you will need to protect players afflicted by Soulbomb so they are not killed by Soulbomb Detonation.
Constellar Designates equipped with Sword of the Cosmos and Blades of the Eternal should be tanked (Melee Attack damage increased by 300%). Additionally, try to keep the Designate equipped with Sword of the Cosmos away from any other designates to avoid Cosmic Power stacking too high.
HEALERS
Players afflicted by Soulbomb and Soulburst will take heavy damage - make sure their health is high enough that they are not subsequently killed by Soulbomb Detonation and Soulburst Detonation.
If you are affliected by Soulbomb, move to the Avatar of Aggramar to avoid being killed by Soulburst Detonation.
Once Gift of the Lifebinder is afflicted with Withering Roots, heal it to keep it alive so that players can use it to come back to life.
Collect Motes of Titanic Power while you are a ghost to empower Khaz'goroth, enabling him to cast Titanforging.