Rapid Spin is an attack, and could be used to 2HKO Sash deo-s with Dark Pulse+Rapid Spin. I did it once. So much fun.One of the biggest draws to using blastoise is that it's the best offensive spinner out there: it's not /completely/ realistic, rather, it's unrealistic to expect that blastoise will run 4 coverage moves.
Usually Ice Beam is the casualty of placing Rapid Spin on Blastoise, but lately I'm wondering if it's really the best choice. ...
now to wait for some (BAN ME PLEASE) to nitpick that rapid spin is actually an attack
In all seriousness, Aura Sphere>Ice Beam 75% of the time. Other than that, I agree. Aura Sphere hits more S/A Pokemon than Ice Beam Super-Effectively, I think.