Been playing assassin since release. Started as Madness, but switched to deception in my 20s, and been toying with that ever since. I might give this another look soon, but this is what I've got.
Just as a quick look already, I might take the 2 out of Static Cling and put them into Insulation.
Unless you PvP a lot, you'd be better off taking the 2 out of Static Cling and putting them in Thrashing Blades instead. More damage on one of your primary moves is much better than Static Cling, unless you PvP a lot where Static Cling is actually somewhat useful. Regardless of rather you PvP or not, Insulation is a waste.