I know from a lot of experience that Darkrai/Dusknoir is really fun, and really isn't that much more complicated to run then running any other Dusknoir deck. It has Sableye to help set up Dusknoir, and even if you don't set up Dusknoir for a bit, does it really matter? There probably won't be any damage on your opponents field until turn 3-4, so it's really not that big of a deal. My list was pretty tight, especially since I usually had either Mewtwo or Terrakion in there as well.