Allright here goes my set...
I'm gonna sweep my rain up with special powers
Surf/ Hydro Pump
Well this set is mainly to take advantage of the water attack. The other attacks are there to counter anything that tries to resist the water attack. ice beam is there for grasses. Psychic tries to take care of everything else like those bulky waters(especially with the sp def weakening). Focus Blast kills the darks/water and also helps for a strong attack. For teh water attack I like surf better just because I hate missing but the power boost for hydro pumb may be really useful in situations. Evs will be 252 speed 252 sp atk 4 hp. Id rather have him jolly but modest is fine.