Without the usage of storyboarding, it's possible to get AR11.5.
To do so, set a map to AR10, and watch it with Auto with no other mods. Once you did this, click on the [2x speed] option on the right side (this option isn't available with DT). The auto play will be sped on a level that will increase the AR from 10 to 11.5, being significantly faster than AR11.
While it's not possible to play on this "for real" (since auto is playing), you can still get a skin where the cursor is invisible, rendering auto's play non-visible, and then play blankly on the map as it goes. Practicing on this makes other ARs look respectively slower, even AR11.