I was think of the two I would pick displacement, because of what you stated above. I wasn't sure how effective Unbound would be at stopping stuns, and if they don't, they why bother. those 2 points can go somewhere else.
Any other suggestions?
reading your above post, how useful is cloak of carnage? I don't find myself using Cloak of Pain too often, am I overlooking what the skill can do?