They can swap between them depending on the ability used, and the Barbarian’s Arsenal System lets you can choose which Weapon applies to each ability.
The rolled affixes of each Weapon are always applied, however the raw Damage per Second (DPS) of a skill is determined only by the attacking Weapon in the Arsenal System. In other words: your main weapon does your damage, and the others are “stat sticks”.
There is one final advantage to holding this many items: more Legendaries! Having these extra powers equipped can prove quite useful and may give the Barbarian an advantage as Diablo 4 expands its itemization pool.
Weapons Expertise table
Weapon Expertise
Rank 10 Power
Rank 10 additional bonuses
One-handed Axe
Increased Critical Chance (+5.0%) against injured enemies.
Double this amount when using two axes.
Lucky Hit: Critical Strikes have up to a 55% chance to grant +0.6% increased Attack Speed for 2 seconds. Double the Attack Speed bonus when using two Axes.
One-handed Mace
Increased damage to Stunned enemies. (x10%)
Double this amount when using two Maces.
Lucky Hit: Up to a 10% chance to gain Berserking for 1.5 seconds when you hit a Stunned enemy. Double this chance when using two Maces.
One-handed Sword
Lucky Hit: Up to a 10% chance to gain 5 Fury when hitting a Crowd Controlled enemy. Double this chance when using two Swords.
Killing a Crowd Controlled enemy grants +15% increased Attack Speed for 3 seconds. Double this amount for kills while using two Swords.
Two-handed Axe
Increased damage to Vulnerable enemies. (x15%)
Increased Critical Strike Chance against Vulnerable enemies. (+10%)
Two-handed Mace
Lucky Hit: Up to a 10% chance to gain 2 Fury when hitting an enemy. Double the mount of Fury gained while Berserking.
You deal x15% increased Critical Strike Damage to Stunned and Vulnerable enemies while Berserking.
Two-handed Sword
20% of direct damage you deal is inflicted as Bleeding damage over 5 seconds.
You deal x30% increased Bleeding damage for 5 seconds after killing an enemy.
Polearm
Increased Lucky Hit Chance. (x10%)
You deal +10% damage while healthy.
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