Here's my strategy. Get a Blissey that knows how to use Minimize, Toxic, Softboiled, and Refresh. First, have Blissey use toxic at the target. Then use minimize. Keep using minimize until its maxed. That way, your enemy can't hit you. BUT! If they do, use softboiled. It restores 50% of hp. If enemy has synchrinoise ability (sorry if misspelled), use refresh to restore status. Its brilliant! Really!