It really depends on what ping you have.
If you have ping 0-100 Use:
Aim assist (default settings are fine for me)
Autoclicker 7.5-13.5
Reach No
Velocity No
If you have higher ping like some people 180-230+ You can get away with:
Aim assist
Autoclicker 8-14
Reach 3.02-3.05 (havent tested...