In the Steam spinoff version of osu!, called McOsu, there is an enhanced mods menu. Try playing maps that are difficult enough for your standards and try playing with an AR setting of 10 or above. What was the highest you could play whilst maintaining an accuracy of at least 93% (the requirement for an S rank FC)? Try to play with a range of AR settings and if you can read higher than AR11, congratulations you're a god in the making.
Edit: Mine is probably 10.8
Edit: Mine is probably 10.8