Thanks for the support, IBD. About the strategy you were talking about: it's called double weather, and while it's not common, it's been thought of before. The best synergy I can think up for a rain/sand team would probably be Tyranitar, Politoed, Ferrothorn, Scizor, Latios, and Landorus. Latios is a noteworthy change over Reuniclus, blocking water and electric (and fire, depending on the weather). It also serves as a fast, hard hitting aspect that your team would otherwise lack. Landorus wraps the team up well by serving as another electric/fighting resist, and also by being the team's foremost sand abuser. Scizor is a change over Skarmory, synergically helping the team against the ice moves that will be a problem with both Latios and Landorus.
Basically, you were on the right track, so nice job. You don't have to use the pokemon I suggest. Experiment and find out what works. You should test out some stuff on PO (if you have it) and post an RMT.