floeyfightslower is just what more people are comfortable with, but if you're trying to force it it's not gonna worki cant hit anything with 6/360 i flick 2 much
use the slowest one you can consistently hit shots with, if you can't use anything slower than 6 inches than it's whatever, just use what you're comfortable with
If you practice with 12/360 long enough, you will get used to it. If 6/360 is too high, and you think 12/360 is too low, find a middle ground that you think could work. Its just all about whatever feels good for you.
But nothing is really going to feel good right away. Regardless of what you make your sensitivity, it will probably take some time getting used to.