Question about Dual Wep Barbs.

It's an aura... Auras effect the end result, not a per-weapon basis.

Plus direct damage of any form or any ability that has a chance to take effect on a weapon applies only to the weapon. It only applies on the weapon that it is on. Cold damage, fire damage, lightning damage, poison damage, damage, deadly strike, open wounds, chance to cast chain lightning, chance to cast static field, chance to blah blah blah blah.

The only mods that work for both weapons are those that are applied indirectly by one of two methods.

1. They are added via a non-melee item. Armor that adds damage adds to the amount of damage you do period. It does not pick a weapon. Charms that add poison damage add poison damage to the end result.

2. They are added through an effect (i.e. aura). Same as before. These effect the end-result.

I don't see how you're even arguing this, Ganga...