in fact, it's very simple to accomplish this task. there 3 things to do.
1. set your mouse DPI to MAX
2. set 5 sensitivities in game to MAX
3. set Cross Hair's HIP/ADS as low as possible
in this way, you will get the best result.
BTW, if you still feel too fast, after changing HIP/ADS,
you may set sensitivities in game a bit smaller.
In this way, you will harness all the potientials of your mouse and game,
and will gain some advantage too.