Good nerf on him, otherwise I would have flat-out rejected. You might want a more diverse movepool, such as Toxic Spikes or Recover. Otherwise it's hard to put together a viable set on him. I'm assuming it retains its Poison typing. Try to look at Arbok as a start and try to build from there improvements you can make to form a superior viper. Until the final revisions are made, I'm sticking with Negative, despite it's sky high stats.