[3.7] Build Help!! Need help optimizing my crit staff cyclone zerker

This is my first build that I have made myself and I could definitely use some help optimizing the skill tree. I definitely need more crit multi.

PoB link: http://poeurl.com/cumV


I have around 1 ex to upgrade gear and/or buy regret orbs. I know I still need to optimize my gear and I am working on getting quality gems.

My main concern is optimizing the passive tree.