Would like to see an immortal Spirit of Redemption

As a holy priest, it pretty much die once i take a hit, thus speccing in SoR comes well in handy. However, the spirit is not immune to damage. You gain about 1500 hp and become that immobilized Spirit Healer, but the mobs will hit you again, and youre down. Is it supposed that i lose aggro, become invulnerable, or both? Would like a fix on this.
Thanks in advance,
The Freetimer

...also, get the server online!!