I think what people are really complaining about here is the ooc and ic conflict that certain items create. OOCly, you want the best possible items for your character, while ICly you would never sink to using an unholy artifact if you were a light-auraed paladin or priest, and vice versa.
In order to fix this problem, you'd have to catelog all the items currently available in the mud that are 'auraed' and make duplicates usable by the other auras under a different name, which would defeat the entire purpose of having 'artifacts'.
The simplest solution to this would, unfortunately for the Imms, be morphing sacred weapons. Weapons that when held by one of the faith would 'morph' into their choice of weapon, but when not held by a faith member would revert to the favored weapon of the diety in question.
Good luck with that