The Vault

Lower Shadowforge City
The lower circuit connects Incendius at the Black Anvil with the Hall of Crafting ramps and Black Vault balcony. Clear a section of Fineous's patrol before intercepting him. Finish Stilgiss and Verek before handling the coffers, and leave the final relic coffer closed until the group is ready for the vault guardians.
The Vault
Watchman DoomgripElite HumanoidWarbringer ConstructElite ElementalOpening the final relic coffer activates the vault guardians and brings Doomgrip, whose healing prolongs a fight made harder by Sunder Armor.
Abilities

Sunder Armor
Prepare tank mitigation as Doomgrip's Sunder Armor increases the danger of the remaining Physical attacks.

Drink Healing Potion
Uses a Holy elixir to heal the caster.
Keep pressure on Doomgrip after Drink Healing Potion restores his health; do not leave the fight to open or loot another coffer.
Tank- Be ready beside the last coffer to collect the activating Warbringer Constructs before the healer draws them. Use mitigation when Doomgrip's Sunder Armor weakens your armor.
Healer- Recover before the final coffer is opened and prepare for the constructs' activation. Expect the tank's Physical damage intake to rise under Sunder Armor.
Damage- Stop coffer interactions when the guardians activate and finish the fight in the cleared vault. Continue focused damage when Doomgrip heals himself instead of assuming he is already defeated.