I have very little rhyme or reason to my methods, but when trying to master a new line length I go back and forth a lot between slowing the boat and shortening the line. (If you’re trying to master 22 off, try a few at 28) Slower passes will give you time to focus on form and technique, but don’t lose your touch with faster boat speeds either. A coach told me once also, that stepping up to the next line length teaches you to be more aggressive even on a longer line. Hope this helps. Happy skiing.