My problem is I don't know how to play an assassin in PvE and I'm not sure on what type of build to use. My PvP build can drop another player with my 4 skill combo every time, even the pesky touch rangers with their stances. But when fighting high level npc enemies, I can't. Also, the enemy AI targets lower armor level targets so when I shadow step into combat, all the enemies turn on me

Right now, my PvE build looks something like this:
-Golden Lotus Strike (For energy management)
-Fox Fangs
-Death Blossom (enemies are often bunched out and this provides some nice AoE damage)
-AoD
-Critical Eye
-empty spot (right now I have Way of the Fox or Way of Perfection, but I'm not sure what to put here)
-Shadow Refuge
-Res sig
My stats:
A/R
-Dagger Mastery 12+1+3 = 16
-Critcal Strikes 11+1 = 12
-Shadow Arts 6 +1 = 7
5 unused points
I'm using the endgame Ceremonial Daggers
Does my build have any potential? Or would it be best to start from scratch?
Thanks for the help,
Sicarius