I'm already using 900 dpi at 3% and half mouse speed. Not sure I want to lower it more without moving furniture so I have room to move the mouse.
When I first started playing I really liked hte assault scope sensitivity for quickly getting grendel headshots, but my playing style changed too much since.
You haven't specified the key thing... which mouse you have? The way to set up each mouse is different as many mice have different options. Also I am not sure if people will help you to set up macros on the main forum, in Crysis wars, macros were considered grey, and these days the anti cheat software kicks players using macro software.