Helm: Crown of Ages
Ammy: Storm Hide
Armor: Enigma Archon/Whyrmhide/Dusk/Wirefleece
Weapon1: Chaos Suwwayah
Weapon2: Fury Suwwayah
Gloves: Trangs (for Venon) / Dracul´s (Life Tap and Huge Open Wounds)
Belt: Arachnid Mesh / Verdungos
Ring1: Raven Frost
Ring2: Bull Katho's (Life leech doen't work in PvP)
Boots: Soul Shenk / Soul Spur

Charms:

5 x Shadow Disciplines
15 x 3/20/20
9 x 20/5 resist all scs
Annihilus


This is what my WW PvP assassin uses. I think it's one of the best setups avaiable. My COA is socketed with 2 x UM runes.
PM me if u need more information like stats, skills, etc ...