Just to start off I've played almost 3 days game time in mw with just under 7k kills and a 2.7 k/d and I've done quite a bit of testing and I've found these settings to be the best I've tried. I've also tested this on both the g pro wireless and the g502 hero, I've found the g pro to be my preferred mouse due to weight and wireless but still works great on the g502!
MW 2.0 ST
12k Dpi
1000hz
Common sync on both hip and ads
Hip sens: 2.6
Ads sens: 2.4
Ads delay 300 With smart transition ticked
No curves, x/y values, steady aim or boost
Sensitivity may be a bit faster for some people's preference so tweak to your liking, I also use standard aa and default settings per st requirements, I'll post full config code once I'm able to!