Okay, first of all, forget the durations on those skills as they're all incorrect. Why?
[skill]Deadly Paradox[/skill]
This single skill makes Deadly Arts and Shadow Arts skills so RIDICULOUSLY unbalanced that it's not even funny anymore. Feigned Neutrality and Dark Escape ready to use on the fly... @ Diddy: you talk about lack of survivability?
Against a DA Sin, sh*t happens before you get a chance to react, especially in the maelstrom of combat. The SoJ Sin RULES AB. Dancing Daggers spamming, Entangling Asp then the ever-trusty Signet of Toxic Shock or its younger brother SoDC... SoJ only makes it worse
Be an Assassin at a distance, that's basically it. A Deadly Arts spike is very hard to defend against.