Here are a few awesome PVP assassin builds i wrote randomly, i believe them to be pretty damn good, I don't know what you experts would think... but i like them:
Critical Strikes, Dagger Mastery and Deadly Arts
(Beware: in this build, there are no healing spells.)
1. Unsuspecting Strike - Damage
2. Temple Strike [Elite] - Dazed, Blinded
3. Signet Of Shadows - Damage
4. Twisting Fangs - Bleeding, Deep wound.
5. Iron Palm - Knocked down if hexed.
6. Mark Of Instability - Knocked down after dual attack
7. Falling Spider - Poisoned if knocked down
8. Signet of Toxic Shock - Damaged if poisoned.
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Critical Strikes, Dagger Mastery and Shadow Arts
1. Unsuspecting Strike - Damage
2. Palm Strike [Elite] - Damage
3. Death Blossom - Damage
4. Mark Of Insability - Knocked down after dual attack
5. Recall - Shadow step to ally when stopped.
6. Shadow Refuge - Healing
7. Death Charge - Shadow Step and healing.
8. Critical Defenses - Chance of blocking.
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Critical Strikes, Deadly Arts and Shadow Arts
1. Jagged Strike - Bleeding
2. Seeping Wound [Elite] - If bleeding or poisoned, foe takes 1-3 health degen extra
3. Black Spider Strike - if foe is hexed: damaged and poisoned
4. Horns Of The Ox - Damaged and knocked down if alone.
5. Falling Spider - Poisoned if knocked down
6. Death Charge - Shadow Step and healing.
7. Shadow Refuge - Healing
8. Heart Of Shadow - Shadow step and healed when hit.
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Enjoy!