Main equipment:

Helm: Harlequin Crest 141 Defense
Armor: Enigma Archon Plate
Weapon: Heart of the Oak Flail - Perfect 40 Resist All
Shield: Spirit Monarch 35% Faster Cast Rate
Amulet: Mara's Kaleidoscope 30 Resist All
Ring 1: Stone of Jordan
Ring 2: Stone of Jordan
Belt: Arachnid Mesh
Gloves: Trang-Oul's Claws
Boots: Marrowwalk +2 Skeleton Mastery, +20 Strength

Switch:

Weapon: Call to Arms - Perfect 6 Battle Orders
Shield: Spirit Monarch for casting Battle Orders

Inventory:

Hellfire Torch: Necromancer Hellfire 15-19 Resist All / 15-19 Attributes
Annihilus: Annihilus unidentified
Charms: 6 X Necromancer Poison & Bone Skill Grand Charm (plain)

Charms: 6 X +20 Life Small Charm

Some gameplay tips:

Tactics

For a typical spell-casting profession, you must remotely cast your spells, while mercenaries and summoning creatures (clay golem) fight in front, and you must not be close to the monsters. Note that because the character max'ed of bone prison and bone walls, the additional synergy of the two skills to the bone armor makes the effect of the bone armor really strong. So don't forget to cast your own bone armor in the town. Once you find that the bone armor is used up in the battle, immediately fill it up!

[D2R Ladder] Spirit Monarch - 35% FCR
$1.45

[D2R Ladder] Hammerdian Full Gear (Elite)
$39.85

[D2R Ladder] Chains of Honor Dusk Shroud 15ED - Perfect Defence
$3.95

[D2R Ladder] Annihilus (unidentified)
$0.35

[D2R Ladder] Enigma Dusk Shroud (15ed, +750-769Def)
$4.85

[D2R Ladder] Organ Set
$1.85

[D2R Ladder] Paladin Hellfire Torch (10-16 Stats, 10-16 Res)
$0.85

[D2R Ladder] Act2 Mercenary Set - Type 2 - Infinity set
$4.85

[D2R Ladder] Sorceress - Mf Full Set (Elite)
$19.85

[D2R Ladder] Breath of the Dying Berserker Axe - Ethereal - 350-379% Enhanced Damage
$1.85

[D2R Ladder] Breath of the Dying Colossus Blade - Ethereal - 350-379% Enhanced Damage
$1.85

[D2R Ladder] Necromancer Summoning Skills w/ 12% FHR GC
$0.95