Unbending Will can be used in six sockets open swords, which includes the colossus and Diablo 2 Resurrected Items phase blades as well as a base 330% enhanced damage modifier. It's only 20% lower than the Breath of the Dying edmg without any high runes being used. Fal The highest rune is a rune that is budget-friendly often dropped in nightmare hellforge or countess runs.
The stats really speak for themselves...and the taunt that is displayed on striking could be efficient for barbs of higher ran