5. Other.
Remember that there are more ways to move than left-to-right. When my shot breaks down, especially in a walled-up league, it is usually the carry that goes away due to carry down. I need a little more back-end to carry. So, I move BACK on the approach, about 1/4 to 1/2 step or so, depending on how much more flip I need.
This isn't for everybody because it can mess with your timing. But it works for me. Side to side moves often cost me some of the area that the shot provides.