Poison Perfect Serpent Warrior pure specters look really promising (~40D invested, still only level 80)

Animate Guardian

[3.23 Path of Exile] HYDRA CRIT Spectres Build | Mapping + WildWood

Raise Spectre

Chains of Command Necro - 100% Deli Minotaur

Animate Guardian's Weapon

ZSkele endgame showcase - Melee Skeletons scale incredibly well!

Vaal Summon Skeletons

Odif's Build Guides for Newbies: Skeleton Mage Necromancer

Vaal Summon Skeletons

POE 3.22 Necromance League Start Build Guide

Minion Damage

my chains of command necro build

Arcanist Brand

GhazzyTV updated his Spectre Necro written build guide for the new Forged Frostbearer

Raise Spectre

Specter Primary Build - Herder Phantasms

Raise Spectre

[Path of Exile 3.20] Currency Farming Metamorph New Atlas Strat in Sanctum League - 1131

Raise Zombie