Best Gear Legendary Aspects

Helmet: Ugly Bastard Helm (core unique)
Chest: Aspect of Might (damage reduction)
Gloves: Accelerating Aspect (AS Diablo 4 Items boost after crit)
Pants: Hectic Aspect (cooldown reduction)
Boots: Hooves of the Mountain God (cleave Bash)
Amulet: Aspect of Adaptability (bonus vs. elites)
Rings: Vehement Brawler's + Rapid Aspect
2H Bludgeoning: Aspect of Earthquakes
2H Slashing: Aspect of the Moonrise
1H + Offhand (optional): Shard of Verathiel + Executioner's Aspect

Priority Uniques:

Hooves of the Mountain God - AoE Bash cleave.
Shard of Verathiel - Supercharges Bash damage using Fury.
Paingorger's Gauntlets (optional) - Boosts damage after resource dump.

Stat Priority

Target these stats on your gear:

+Ranks to Bash, Heavy Handed, and Belligerence
Chance for Bash to hit twice
Wrath of the Berserker CDR
Damage while Berserking
Crit Chance and Crit Damage
Chance to Restore Primary Resource
Strength
Armor Resistances
Max Life

Runeword: CirTec

CirTec is vital for turning your Fury rotation into an Earthquake-producing machine:

Effect: After casting 5 Skills, gain 300 Offering and trigger an Earthquake.
Overflow Effect: Overflowing Offerings increases the Earthquake size/duration.

This allows constant Earthquake uptime while rotating Bash, War Cry, Ground Stomp, and Shouts.

Paragon Boards and Glyphs

Here's a great endgame Paragon path for this Bash build:

Starter: Exploit (Vulnerable uptime)
Decimator: Rumble (bonus damage per Earthquake)
Blood Rage: Blood Rage (damage boost per Fury spent)
Might: Might (2H weapon synergy)

Other Glyph Options:

Territorial - More damage to close enemies.
Crusher - Bonus damage with Bludgeoning weapons.
Ire - Extra Berserking effect.

Take blue (Magic) nodes for resource gen and yellow (Rare) nodes for increased damage or survivability. If you're dying often, replace some offensive nodes with Life or Armor.

Final Thoughts

The Bash Barbarian is a deceptively simple build that gets better the deeper you go into Diablo 4's endgame. With powerful Earthquake synergy, strong single-target burst, and solid AoE, this build is ideal for clearing Nightmare Dungeons, boss runs, and even PvP with a few tweaks.

However, its reliance on specific gear makes it less viable for leveling. Once you've assembled the core components-Hooves of the Mountain God, Shard of cheap Diablo 4 Items Verathiel, and CirTec-you'll be unstoppable.