My favorite Necromancer combo is a weak pvp but mostly all pvm character. I am still working on it, but it is able to take everything but Council Members in Hell solo (yes, Chaos, Nihlathak, Baal, and afew ubers). But because of my low resistance my necromancer dies easily to the Council Members.
gear- Weapon- Beast (ettin axe)
Armor- Enigma (mage plate 15% edef)
Shield- Spirit (monarch 15% edef)
Helm- Harlquin Crest (Ber rune socket)
Boots- Marrowwalk- 2 skill x/x stats
Belt- Thunder God's Vigor
Rings- x2 Wisp Projector- 20 lightning absorb
Charms- x9 summon gc- Necromancer Hellfire Torch- x/x/x Annihulus
sc
Switch Weapon/Shield- Call To Arms(flail)- Spirit(monarch)
If you would like to try this build, then feel free and go ahead. But please, if you find a way to increase the resistances past -'s (lol) please post the changes to me? Thanks.