The necromancer, master of the dark arts, the original loot frame - Nekros!
Passive: Nekros and his Companions regenerates 5 Health when an enemy dies within 10 meters of him.
Soul Punch - A blow so powerful, it turns the enemy’s very soul into a deadly projectile, damaging all in its path.
Terrify - Casts fear into the hearts of nearby enemies, causing them to run away in terror.
Desecrate - Forces fallen enemies around you to drop additional loot.
Shadows of the Dead - Summons shadow versions of vanquished enemies to fight alongside you for a short period of time.
Acquisition: Main blueprint can be purchased from the Market. Component blueprints can be obtained from defeating Lephantis on Magnacidium, Deimos.
Property is shared with Trinity, Nezha and Yareli too, so they’re all super tanky. Yareli with a Fortifier Akarius is kind of hilariously braindead. According to the wiki, Nidus benefits as well.
One thing I realised, because of how complete Nekros’s kit is, he has a lot of room to mess around with different helminths. I’ve been having fun with Thermal Transfer, although sadly it doesn’t apply to summons.