Weapons: Breath of the dying mace/axe/sword x2 pick 2 different weapon types.
Weapon swap: Lawbringer for a phys resist debuff.

Helm: Harlequin Crest.

Chest: Enigma or Chains of honor.

Legs: Phys dmg/resists/life/AR

Shoulders: Phys dmg/resists/life/AR

Gloves: Phys dmg/resists/life/AR

Boots: Gore Riders (our source of CB)

Belt: Arachnid Mesh or Mythical Chains of Anquish

Amulet: Highlord's Wrath or Mara's Kaleidoscope

Rings: Phys dmg/resists/life/AR or BK rings

Medal: Necromancer Annihilus + to Poison nova

Relic: Titan's Trinket (Concentration) or Necromancer Torch (+2/3 Poison nova)

Components:

Weapons/Helm/Chest: 1x Cham rune 3x Gul rune
Cham rune to cap freeze/stun resist etc.
Gul for AR.

Rings/Amulet/Medal: Acid to Physical Facets

Pants/Shoulders/Belt: Reistances you need.

Gloves: Restless Remains for cast speed and leech or resistances.

Boots: Mark of Modgrogen or resistances

Augments:

Weapons/Rings: Anything with phys dmg.
Armor: Fill your needed resistances.

Look at the pictures!

You may ask why the hell Concentrate????
Well you see you can weave it in between poison nova casts to give yourself insane AR/Defense/Armor buff so why not?

Weapon masteries pick 2 depending on the weapons you are using.

Natural Resistance: this is really useful for over capping your resistances for uber tristram (you need around 120% overcapped elemental resistance for mephisto).

Stats: Enough STR/INT for gear rest DEX.

Lawbringer's decrepify sticks even if you swap weapons so it can be used as a debuff weapon swap for the build.

Merc: Act 4 Offese or Act 2 Blessed Aim.

This is a end game setup so level as either tremor barb or teeth/poison nova necromancer.