So I was thinking of a concept deck featuring Heelix and a 2-2 Regigigas LvX. You can use Rainbow Energy and Energy Stream them back providing the necessary requirements for Regi. Additionally, you can utilize Celebration Wind to move the energy around and Warp Point, Switch or Warp Energy to make it happen. Seeker will pick up your Tanks and of course you can always Sacrifice to setup a Twins Early if needed. The base deck is Heelix with Blissey but with a 3-3 line giving 2 spots for Regi. Some I have discussed this with have discussed possibly keeping the Regi Lock.. but in this current state of the Game, High HP Basics can provide some staying power. So just wanted to share a concept thought that might make a Play!