Main equipment:

Helm: Griffon's Eye (-resistance + +damage >= 30%)
Armor: Chains of Honor Dusk Shroud
Weapon: Eschuta's Temper +3 Skills & +20% Lightning Damage
Shield: Spirit Monarch - 30-34% FCR/89-112 Mana/3-8 MA
Amulet: Mara's Kaleidoscope 25-29 Resist All
Ring 1: Stone of Jordan
Ring 2: Stone of Jordan
Belt: Arachnid Mesh
Gloves: Magefist
Boots: Sandstorm Trek - 15 Strength

Switch:

Weapon: Call to Arms - 4-5 Battle Orders
Shield: Spirit Monarch for casting Battle Orders

Inventory:

Hellfire Torch: Sorceress Hellfire 10-14 Resit All / 10-14 Attributes
Annihilus: Annihilus 10-14 Resit All / 10-14 Attributes
Charms: 3 X Sorceress Lightning Skills Grand Charm (plain)
Charms: 3 X +20 Life Small Charm

Some gameplay tips:

Telekinesis is to be used on some monsters that are immune to your attack (such as the lightning immune monster even with the help of Infinity, although it is rare but still exsist). With Telekinesis, the monster is forced back and pushed to the corner and can't move. The mercenary goes up and finish the kill (for lightning-enchanted monsters, when it dies, the telekinesis will result in explode lightning bolts, pay attention to where you stand). Of course, this auxiliary skill only needs 1 point. In addition, the Telekinesis can also be used to open some doors, cans, open boxes, waypoints and so on.

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

[D2R Ladder] Fortitude Archon Plate - 25-29Res/1-1.375Life
$0.95

[D2R Ladder] Act2 Mercenary Set - Type 3 - Insight set
$2.45

[D2R Ladder] Infinity Cryptic Axe - Ethereal - 255-299% Enhanced Damage
$2.85

[D2R Ladder] Vampire Gaze
$0.35

[D2R Ladder] Sorceress - Mf Full Set (Exceptional)
$12.85

[D2R Ladder] Enigma Dusk Shroud
$1.85

[D2R Ladder] Griffon's Eye Diadem (-20% resistance, +damage 10-12%)
$4.85

[D2R Ladder] Beast Berserker Axe - 240-259% Enhanced Damage
$1.85

[D2R Ladder] Stormshield - 148 Base Defense - Perfect
$0.75

[D2R Ladder] Last Wish Phase Blade (330-359%ed, 60-64%cb)
$4.85

[D2R Ladder] 20life to Vita small charm (plain)
$0.19