Nice build, but a quick suggestion: If you choose 9-0-21 masteries instead of 21-0-9, you will get more cooldown reduction, and then you can switch out The Brutalizer with a more useful item.

EDIT: I was wrong, it's not worth it. I was a bit confused when I wrote this, so nevermind me xD

AH Thank you, sir.
Changed it :)

Nice guide, but theres are problem with your skill sequence. You can't max Acid Hunter at level 8, its level 9.