-25 loop has helped me nail -28 just about every set. Closer to 28 than 22 and allows you a little more space and time to perfect everything that has been described here.
99% these guys grew up on a private ski lake or at least skiing buoys from a very early age so it's pretty easy for them to run this line length and do what has been described but it takes a lot of reps. Also don't think of too many things at once going into your pass
1) Get up on the boat farther as stated many times,..with a progressive pull out and drop in toward gates -don't kill it. This will result is crazy angle putting you early into 1 ball to Finish your turn at the ball and Not start your turn at the ball
2)Keep a long straight back . arm, but the trick is don't get lean locked.....rather allow the ski to release and get an early edge change ** while keeping long, locked in back arm all the way out bound.
At -22 you can get away with a lot of mistakes at -25 and -28 you get late and eventually your body pays for it.