Few women can t throw a pitch over 75MPH, so a women's riseball has a flat trajectory as it goes over the plate. For women, a riseball is easier to hit than a fastball *IF* the batter can predict when the riseball is thrown. The pitch is always at the top of the strike zone and the trajectory is flat, so the batter uses a "level swing". Lisa Fernandez murdered riseball pitching.
If I'm understanding all this, and I think I am, this tells me that there really is not such thing as a "riseball swing" (or a "softball swing," which is meant to combat the riseball) because, no matter the pitch, your swing is already supposed to be flatter/more level on higher pitches.