Guide 1 - PvP Necro FAQ By c9h13no3
Helm: Harlequin Crest (Um'd)
Armor: Enigma
Ammy: 10% Cast, +2 to Necro Skills, ect. Amulet
Belt: Arachnid's Mesh
Gloves: Frostburns
Ring 1: Soj
Ring 2: Soj
Boots: Marrowwalks
Shield: Spirit Monarch or Stormshield whichever your desire.
Shield 2: Spirit for +2 skills with Call To Arms.
Weapon: Heart of The Oak
Weapon 2: Call To Arms
A PvP necro would never use Marrowwalk unless he wanted to be laughed at. I would use Waterwalk, for the great life bonus, extra fire resist and defense. Silkweave, however, is also a desirable alternative, with double the defense vs. missle of waterwalk, and +10% maximum mana (I just don't see this necessary though).
If you use nova, there is no reason to waste your shako's socket with an Um. Use a 5/5 facet. If you don't use nova, there's still no reason to use the Um - you won't have even close to maximum damage reduction, so use a Ber here, or if you prefer, a Jah for life.
As far as the amulet, if you've ever seen a pcp necro you know he has a PLENTY fast cast rate without needing the 10%fcr on ammy. Use +3 PnB with a life mod, or Maras if you are running very (45 or lower) low on resistances.
I prefer Magefist for gloves. Youre merc's med aura takes care of your mana, you don't need that much. However, if you find you can settle with the slower cast rate, you are free to use frosts.
And finally, you should keep a Spirit and 5/5 facet'd SS and use the SS against melee duellers, spirit against nonmelee duellers.