Did I say remove it? I actually said add to it. Like the Knucklehead Radar helmet, which says "More Super energy from non-Guardian kills." Add that "non-Guardian" part to the end of the Thorn's Mark of the Devourer perk, et voila, it's fixed. It's still a 3 shot kill. It's still got crazy good range. In PvE it would stay exactly the same.