Spirit Boons

Spirit Boons play a huge role in Diablo 4 Items sustaining Spirit and increasing output. Here's the optimal loadout:

Deer: Gift of the Stag - +30 Max Spirit, +10/sec regen.
Eagle: Swooping Attack - +20% Attack Speed for faster Quickshift.
Eagle: Avian Wrath - +40% Critical Strike Damage.
Wolf: Energize - 15% Lucky Hit chance to restore full Spirit.
Snake: Obsidian Slam - Every 6th attack Overpowers an Earth Skill (Pulverize synergy).

If you have good Resource Cost Reduction (via Masterworking or Uniques like Ring of Starless Skies), you can swap Energize for Calamity to extend Grizzly Rage's duration.

Horadric Spells (Season 9)

The Horadric Spell system adds powerful seasonal modifiers. Here's the optimal combo for this build:

Catalyst: Astral Pillar - Constant AoE + Taunt synergy.
Infusion: Corrosive Vapor - Converts Pulverize to Poison Damage. Also applies +150% Poison DoT and disables Vampiric effects.

Arcana:

Fractured Core - Disables damage resistance aura.
Potent Alloy - Breaks barriers and knocks down enemies.
Bloody Charm - Sends out waves that execute low-health targets.

This combination makes your Pulverize deal both front-loaded and DoT damage, turning every slam into a room-clearing nuke.

Best Mercenary

While some builds benefit from Raheir's spellcasting, you're too tanky to need him. Instead, go with Varyana for bonus melee output and healing support.

Mercenary: Varyana

Cleave
Hysteria
Bloodthirst
Bloodlust

Use Raheir as your reinforcement with Crater linked to d4 mats Pulverize, to maximize your AoE potential when Varyana pulls enemies in.