Gear You'll Need

To make this build work at Diablo 4 Items peak speed, you'll need to either farm or buy Diablo 4 gear with these stats:

Armor: Movement Speed, Cooldown Reduction, Damage Reduction (optional GA rolls ideal)
Weapons: Strength, Critical Strike Damage, Greater Affix multipliers
Jewelry: Fury on Hit, Resource Cost Reduction, Max Fury

Aspects:

Dust Devil Aspect (Whirlwind AoE spam)
Leapquake Aspect (burst on mobility chain)
Unconstrained Aspect (Wrath uptime extender)

This gear must include Greater Affixes. Without GA items, your multipliers will feel capped, and the build won't hit its insane speed-farming potential.

What Are Greater Affixes (GA) and Why They Matter

Greater Affixes (GA) are enhanced versions of existing stats on gear.

Regular gear caps around item power 750.
GA items boost rolls toward 800+.
Each GA effectively "super-rolls" a stat, turning good bonuses into elite ones.

For Barbarians, the most valuable GA stats include:

Critical Strike Damage
Movement Speed
Strength
Fury Generation
Cooldown Reduction

Every GA you add to your loadout compounds the build's efficiency. That's why GA items are mandatory for buy duriel mats Season 9 optimization.