Showcase:

• Uber Sirus
• T17 Sanctuary

Defenses:

• 75/78 Block
• Divine Flesh (50% elemental damage taken as Chaos) + Doppelgänger's Guise (40% less Physical and Chaos damage taken ~including DoT)
• Capped Spell Suppression
• Decent bit of Evasion
• Taunt from Minions (10% less damage taken)
• Leech and 10% Phys reduction from Bone Barrier
• 4x Endurance Charges (Perfect Warlord Spectre)

Spectres:

• Perfect Warlord (Endurance Charges + Vitality)
• Perfect Forest Warrior (Onslaught + Cull)
• Perfect Hulking Miscreation (100% increased damage + 30% increased attack speed to Constructs ~which includes Animate Weapons)
• Perfect Primal Thunderbird (Grace)

AG Gear:

• Crown of the Tyrant (white socket)
• Dying Breath
• Asenath's Gentle Touch
• Windscream
• Gruthkul's Pelt

Cons:

• Mana issues, must use mana flask. Ideally you'd want Eldritch Battery but I'm not pathing there because I wanted to have Spell Suppression.
• Minion base duration is low, so you'd need to summon them frequently ~it's possible to take the Skill Effect Duration cluster but for 4 points invested you'd go from 25s to 37s which didn't seem worth it to me.

PoB: https://pobb.in/zKzynC1hYuEZ