Go for ThunderPunch
In-game is all about attacking with brute force. Moves like Sandstorm and Hail are hardly used. The set I would use is:
Rhyperior@Muscle Band
-ThunderPunch
-Stone Edge
-Earthquake
-[any move that will provide good coverage]
Besides, Rhyperior will be able to cover Water-types with a strong move like ThunderPunch. Its Attack stat is sky high as you already may know. But make sure you have a Pokemon with Water Absorb and/or Sap Sipper to make up for its short comings.
Hope this helps!