so u need to choose the most convenient and NEVER CHANGE IT
like how are you sitting, where is the mouspad, monitor and keyboard, in which area of the mouspad is the mouse etc
bro its a bad habit to change this stuff.
Just find your setup and keep playing dm like 2-3 hours, and thats it, try to not change it.
and you must be able to turn in any direction as quickly as possible u know. it already depends on how you move the mouse, from this you need to start, this thing is why all people have different settings.