There seems to be a healer next to him most of the time. If you can't pacify then just root the cleric and pull Archon G'vin out of the building a ways so he does not get heals.
He's rootable too, so you can root and dot all you want.

Submitted by: Etelos Bo'Reven, The Cruxshadows Zebuxoruk Server
Applications of Suffering
Book of the Dead
Shawl of Celestial Power
Tactical Hatred
Teachings of Innoruuk
Tome of Dark Healing
Tome of Prophetic Visions