Comments are welcome but I'll say in advance it's been working good for me.
Never the less I'm open for opinions

Skills
[skill]Seeping Wound[/skill][skill]Expose Defenses[/skill][skill]Black Spider Strike[/skill][skill]Twisting Fangs[/skill][skill]Black Lotus Strike[/skill][skill]Blades of Steel[/skill][skill]Feigned Neutrality[/skill][skill]Dark Escape[/skill]
Attributes
Critical Strikes: 12+1
Dagger Mastery: 8+3+1
Deadly Arts: 5+1
Shadow Arts: 9+1
Weapons & Armor
Zealous Daggers of Enchanting
Shrouded Armor for the energy benefit with one additional Attunement Rune.
This can be changed by a Vigor Rune according to own taste.
Counters
Like any Melee build, Blind and Wards can disrupt your combo.
Use
The only defense there is is Feigned Neutrality and Dark Escape :P
Dark Escape is also used to quickly reach the shrines.
A high damage output build that results in a lethal attack within 4 hits
Start by putting Seeping Wound and/or Expose Defenses (works perfect on touch rangers etc.) on the target.
Follow up with the first two skills: Black Spider Strike + Twisting Fangs.
This will result in a -10 health degen and a Deep Wound lowering your targets health even faster.
Then hit them with Black Lotus Strike and Blades of Steel to dish out even more damage and regain a whole lot of energy. Your combo will 90% result in a kill.
Enjoy

PS...
This is for Alliance Battles since you're close to useless if you got DP.