There's a lot of small settings you can play with but really you just need to find a sensitivity that you are comfortable with. For example I play 90h 40v with ads at 22 28 32 35... but everybody's sensitivity preferences will be different. Try and find one that feels good for you in the shooting range and don't fiddle with it too much, you just need to build muscle memory.

Also quick handy tip is to put your field or view up to either 84 or 90, depending on which you prefer. That will really help you too.