DoW
formally Death on Wings
Here's a game of Barida playing using Leftovers Toed Swift Swim. While he won, I think that had the opposing player played better it would have been far closer. That said, his opponent was using Megazard Y which is one of the better SS counters around so I'm not sure how much this replay tells us. However I do think that the lack of 8-turn rain was noticable for Barida's team as he had to be more careful with Toed (not sacking it at the end). However I'm not sure if a Damp Rock + SS ban would be enough of a nerf. We wouldn't want another Baton Pass situation where the same thing has to be nerfed multiple times I think.
Anyway, the replay: http://replay.pokemonshowdown.com/frost-oumonotype-736737
Anyway, the replay: http://replay.pokemonshowdown.com/frost-oumonotype-736737