From a pvp survivability standpoint using deception, since Duplicity can only proc once every 10 seconds wouldnt it be worth it to spend only one or two points there and put the extra remaining points in Insulation? Since most abilities hit more then once there is a pretty good chance u'll still be able to utilize the duplicity maul every 10 seconds with only a 10% chance on hit. Picking up the extra armor seems like a good damage reducer.
Also, why not pick up Lightning Recovery to reduce kiting and get more force shrouds in.
The build i like for PvP is this: http://www.torhead.com/skill-calc#200McMZrGrRkhrbtz.1
I feel it gives better survivability.