Necromancer The Thrill Conquest Build (Season 12 / Patch 2.6.1)

Active Skills
Grim Scythe Cursed Scythe Command Golem Flesh Golem 1 Bone Armor Dislocation 2 Corpse Explosion Close Quarters 3 Corpse Lance Ricochet 4 Land of the Dead Frozen Lands
Passive Skills
Blood is Power Stand Alone Draw Life Spreading Malediction

(diablo3.com link)

This build is specifically created for The Thrill conquest (complete a Greater Rift 45 Solo without any Set items equipped).

As you approach a fight, make a triple attack with Grim Scythe Cursed Scythe to apply the triple curse utility effect on nearby enemies; top it off with a stun from Bone Armor Dislocation to trigger the Krysbin's Sentence damage bonus. Then, proceed with the damage portion of the build — an amalgam of Corpse Explosion and Corpse Lance; you will use the former to clear large packs of trash, and the latter — to finish off any elites left standing (or the Rift Guardian). In order to begin your assault in the first place, you will generate an initial stack of Corpses with either Command Golem Flesh Golem (small engagements), or Land of the Dead Frozen Lands (big, important fights).

In your gear, legendaries that enhance Poison damage and Cooldown Reduction should take priority. Your damage dealing abilities dictate the highest priority items: Moribund Gauntlets, Grasps of Essence (cubed), Corpsewhisper Pauldrons and Nayr's Black Death (cubed). Other high tier recommendations are Dayntee's Binding, Aquila Cuirass, Trag'Oul's Corroded Fang and Krysbin's Sentence. The remaining suggestions are merely helpful, but will not make or break the run.

Properly allocated Kanai's Cube choices and decently leveled legendary gems will all but trivialize The Thrill conquest. Do not neglect them.

Slot	Pieces	Stat Priority
Head	Leoric's Crown	Intelligence Socket Critical Hit Chance Vitality
Shoulders	Corpsewhisper Pauldrons	Intelligence Vitality Corpse Lance % Area Damage Armor Corpse Lance %
Torso	Aquila Cuirass	Intelligence 3 Sockets Vitality Armor
Wrists	Ancient Parthan Defenders	Intelligence Critical Hit Chance Poison Damage Vitality Armor
Hands	Moribund Gauntlets	Intelligence Critical Hit Chance Critical Hit Damage Cooldown Reduction Vitality
Waist	Dayntee's Binding	Intelligence Vitality Armor Life %
Legs	Golemskin Breeches	Intelligence 2 Sockets Vitality Armor
Feet	Illusory Boots	Intelligence Vitality Armor Movement Speed
Amulet	The Johnstone	Socket Critical Hit Damage Critical Hit Chance Poison Damage Intelligence
Ring #1	Krysbin's Sentence	Socket Critical Hit Damage Critical Hit Chance Cooldown Reduction Intelligence
Ring #2	Stone of Jordan	Socket Critical Hit Damage Critical Hit Chance Cooldown Reduction Intelligence
Weapon	Trag'Oul's Corroded Fang	High Damage Range Socket (preferably from Ramaladni's Gift) Intelligence % Weapon Damage Cooldown Reduction Vitality
Off-hand	Leger's Disdain	High Damage Range Intelligence Crit Chance Cooldown Reduction Area Damage

Slot	Gems
Jewelry	Bane of the Trapped Molten Wildebeest's Gizzard Bane of the Powerful
Helm	Flawless Royal Diamond (CDR)
Torso and Pants	Flawless Royal Topaz (Damage and All Resistance)
Weapon	Flawless Royal Emerald