You allow them to do it for you! The idea for them is to get goin on discarding your hand, right? If they target enough Energy Early Game, which will occur with Smeargle getting it for you, you just take your time on setting up your benched Blissey's until they decide they have discarded enough and want to start attacking you, or you decide you have enough nrg to OHKO them! It is simple yet effective. If they decide to not Baleful Wind your hand, then you just keep stacking Energy on your Chansey/ Blissey until they KO either your Smeargle or Spinda.
You could modify this list as it was created in all of 1 minute. Just came up with it as I was typing. Take Pokedex to 2 and Nav to 3 and toss in 3 TVR! Easy as that! Now you are discarding! You have to think outside of just what is written! I never said this was the list for everyone, but it wold definitely help against DWD. By using all the Trainer you can minus one or 2, you can thin your hand quickly just to reload it with Energy Cards from the deck!
~Prof. Fish~