Here's a build that I think has real potential for PvP:
Dagger Mastery: 12+4
Domination Magic: 11
Critical Strikes: 5+1
Golden Lotus Strike
Cry of Frustration
It's basically a shutdown mesmer that kills them, too. Between Temple Strike, Disrupting Stab, Power Spike, and Cry of Frustration, you should be able to stop any caster's key spells. And all of those skills do damage as well, so while you shut them down their life total is simultaneously falling. Then you can go on a Repeating Strike spike to finish them off, or just keep doing damage through attacks.
And this build should be stronger against non-casters than a typical shutdown mes. Not only can it just fight back with the assassin skills, but the blinding from Temple Strike can help a lot against wars, rangers, and assassins.
Golden Lotus Strike is there to fill up energy, although I have to test it to see whether or not Mantis Sting would be better in the slot. Crippling is always good, as is having a lead attack that refreshes much faster...
Any thoughts on the build?