Dimitri,
I am not very experienced in competitive play, nor am I very good,however, I use TTC white dials for safeties (to spin) sometimes to stay deep and then adjust after the catch, TTQB or sticks passing (advanced pivot per DSMFL rule)...also an RB or two to run left or right off tackle. I will say, often I don't get the dial just right, but I like to at least try for changing it up a bit.
Also, I use them for "loopers" as well in conjunction w/buzzball speed or a miggle rookie that accidentally loops and is fast
...
I also use proline TTC strong dials for "O" line to try and open holes...I am not very good at creating holes however...probably because I don't have the confidence (balls)
to implement wider line splits on the line...
I don't have it all understood, however, experimenting, to me is key...
Hope that helps a bit,
Joe Ram