Got this off of a Coterie Assassin in Katta. Conned blue to lvl 51. It gave me and a 52 druid a pretty hard time, we both almost died. They have an instant lifetap that did about 200 dmg to me, but he only used it once.
This loot sure does suck considering the lvl of the mob. The only use this has is to give to a n00b because it's not hard for any of these classes to get 6AC on their shoulders.