Wow! Very Amazing build, But I think, I know that crushing blow will not kill the mobs or the monster, so for me the more important is your DPS than crushing blow, 1 Crushing blow is Enough , focus to element damage so you can easily kill it . Im telling in higher floor you need to kill the monster very fast and base on my experience, having high element Damage is More important than having max crushing blow, Try to build Dmg type that can crit hundred billion its more fun than crushing blow.
Im not againts your build just saying!! Hahahaha