Soak is a fascinating gimmick, if only because of Shedinja.
Water has 2 weaknesses. One of them (Electric) is drawn in by Lightningrod. Basically, this means that a Soaked Shedinja in Doubles can only be hurt by grass moves, as long as it's partnered with Manectric or Rhydon. Add a Scarf Golduck to the team to use Soak and clear weather, and your Shedinja becomes really, really hard to KO. If there was such a thing as NU doubles/triples, I'd give it a shot. A flamethrower from Manectric or X-Scissor from Shedinja will keep the Grass-types in check.
If you're creative, don't copy and paste this into your signature (Started by 3.14kachu).