I posted about this idea way back when. For me there are a couple of problems. The muscles get tenser the farther away you go from neutral arm position and that slows down the arm. If you do the twist in the reach back. The later you do the twist the faster the arm moves and the wrist snaps. I had a lot of inconsistencies with the exact angle of release in nose down and hyzer/anny angles. So i stopped trying soon. Annies on distance lines are the only shots that i've used this trick on in play.
You might want to look at videos of Dave Greenwell, Joonas Hynönen and Emil Dahlgren. All of them tilt the disc fairly upright at some point of the arm pull and twist the disc into the correct angle late in the snap. Try that if this ain't hard enough. Those guys twist counterclockwise. There is no law that denies starting with counterclockwise turn and then finish with a clockwise twist as far as it will go.
Karate anyone? There is a punch in Karate, where the wrist is snapped from knuckles down to knuckles up for added power. The same motion gives a harder snap in DG. And it gives you the possibility of adding power. If you can train it to accurate and consistent enough for open field golf, great. I have done the counterclockwise to flat twists without thinking in field practice sometimes lately. More snap. And it surprised me in getting level flight. So learning is certainly possible. Going to clockwise turn adds difficulty, but there are many more athletically gifted people than me and given time... So thus far i've never tried combined counterclockwise to clockwise twist in one throw, because i wasn't happy with accuracy before.
Flat shots need running on the center line of the tee and planting each step on the center line. Anhyzer needs running from rear right to front left with the plant step hitting the ground to the left of the line you're running on. Hyzer is the mirror of that.