Ghost Sword and Final Hit

So I was fighting the hellcats after killing the banshee in peaca basic, and did fh with two ghost swords for lulz. They didn't take any durability loss and i was able to use them continuously. I don't know if this is a bug or glitch or something to do with hellcats, but if ghosts swords don't take durability loss when using final hit, it seems like an effective strategy to maximize sword usage and do serious damage to the banshee. Just an idea.

When using Final Hit, no durability is used on your weapons for the duration of the skill. This is an intended effect. :)

EDIT: This only applies for melee weapons! ~Just to clear the air