This mod doesn't work for weapons from Spartan Weaponry. It would be great if you could look into this and get back to me if this is possible or not. Thanks!

To add to this and make it a bit more specific, when putting a Spartan Weapon in your off-hand and hit a mob, the weapon in your main-hand will get the impact to its durability instead of the off-hand.

A fix for this would be great, thank you <3