Iron grip so you get no disarm yes, still there are several ways to get around this easily in very cheap manners, unless this was changed over the years. The weapon still can be passed to others(which makes no sense to me) and or stolen with merely quick fingers. This does not mention the simple dispel/disarm/fumble. I would think if you took time, a dark pact, and a part of yourself to imbue a weapon, you would be damned before letting it out of your grip, rather than a simple weapon you pick up off the ground. Iron grip does cover this, to a what I have seen in the past, flawed degree. It does not make it so to destroy what should be an extension of the ap you have to destroy him as well, which was the whole point of what I was saying earlier. To get a decent weapon takes a lot of time, effort, and killing, I do not see why to destroy one should not take killing the ap as well, it would only seem fair/balanced.