This build is not to carpet the enemy field with SS and watch them fall but to increase the death times utilizing the enemies attacks against him, while gaining the bonus of aoe dmg to weaken other targets in the field.
I have been using this and its less tankable then flashing blades but much better in group support thru aoe dmg buffing (without AOE trigger ).
try it and enjoy.
PvE
"Spiteful Assassin"
11 + 3 + 1 Dagger mastery
10 curse
10 shadow
8 critical strike
Plague touch
Spiteful Spirit {Elite}
Shroud of distress
Shadows refuge
Golden Lotus strike
Desperate strike
Gold Phoenix strike
Death blossom
405 hp
25energy (30 with +5 energy daggers)Still looking for set i like look of

Weapon:Xuekao daggers
Sequence: SS,Shroud of distress, desperate strike, golden lotus strike,golden pheonix strike,death blossom.
Use Shadows refuge and plague touch as needed AND to meet the conditions of golden lotus/pheonix strikes if stripped.
the energy is not bad managed right does require waiting on 1-2 energy to start the next cycle +5 energy will greatly help this. I have had great success with this build and hope all you A/n try this out.
DO NOT try to cast SS on more then your target.lol you only ask to drain what keeps the assassin alive.... a dead target.lol
let me know what you think.