RG Live WotLK 3.3.5a

OK, managed to locate the issue you are having. The aura you get from equipping the cloak had a condition to only work in Temple City of En'kilah. I have changed it so the aura from the cloak will activate if cloak is equipped in Spire of Decay, Spire of Pain & Spire of Blood (they are different zones from Temple City of En'kilah) now as well. However, it needs to go through testing and wait for next updates to be pushed live if accepted.

You can do the following now: Unequip Imbued Scourge Shroud and then equip it again while you are in Temple City of En'kilah (not in the spires yet). Then you should be able to get the aura and walk ---> receive quest credit.

Best wishes,
Despondency