To be honest, you're in the wrong brand for slow response...but if you wanna make a storm ball work for slow response, try a tropical breeze hybrid, drill with the pin on or very close to your axis, and dull it, 800, possibly 500 abralon.
Other idea, I'm not sure what surface your super natural is, but drill another one, or a regular natural if you can find it, and use a very dull surface.
I'd also suggest something weak from Brunswick, if you can find a brand new karma, whether its the blue solid or blue/green pearl, they are some of the weakest smoothest balls I've thrown. They never seemed to be that popular so you may still be able to find one on closeout cheap.