I've just been using a simple choice scarf set with maxed out speed/spec attack and the rest into defense/hp. I run Shadow Ball/Thunderbolt/HP Ice/Sludge Bomb. I am considering getting rid of HP Ice, as it was mainly for Dratini, and Sludge Bomb nearly KO's, too, so its only use is LeftoversTini. Which i have never seen, as oran berry outclasses it.
And truth be told, immediately after Missy's leaving, I have only seen one stunky. I have seen a ton of munchlax though, and they are becoming soooo annoying. That is the main reason for sludge bomb, as with it, it is possible to beat munchlax.