I usually carry a Rapid Spinner since Spikes + Sandstorm can still wreck grounded mons. However, if your grounded mons have reliable recovery (Recover / Softboiled / Wish) you may forego Rapid Spin. Spike-stacking is a popular strategy since ADV, so usually Rapid Spin is useful if you want to minimize damage.
I'll say add a Rapid Spinner and see how useful it is. If you don't find clearing Rapid Spin being helpful for your team, then you should consider replacing it. Forretress, Claydol, Cloyster, Armaldo, and Starmie are all great options. On Claydol I like giving it Shadow Ball for Gengars. You can also give it Toxic to punish Dusclops or add CB to ensure an OHKO on Gengar with Shadow Ball. Forretress and Cloyster can set up Spikes as well as Rapid Spin. Armaldo can threaten spinblockers with Swords Dance + Rock Blast / Rock Slide.