I have pretty much the default set up. I have the Steelseries GW2 mouse ( http://steelseries.com/products/game...2-gaming-mouse ), and just used the default setup it already has for the game. I then bound 'U' to Stash/Unstash weapon. Will bind turn around and look behind at some point. The mouse is pretty much perfect - only 7 buttons + a dpi switching button. 7-0 are bound to the side buttons, and the heal skill is bound to the middle scroll wheel button. It's wonderfully intuitive. Having a mouse with good dpi also makes a huge difference - I would recommend it.
Also running the FoV adjustment switch in the game's target line. That has helped a lot too.