On a slightly unrelated note, I saw someone playing Manaphy EX and Water Energy instead of Float Stone. I thought that was pretty neat, and I guess you could use that to attack with Bee Revenge without DCE. You wouldn't have free retreat with Vileplume though.
Why are you saying Vileplume wouldn't have free retreat ? Seems to me like the whole purpose of Manaphy EX is be to attach a Water Energy to Vileplume when it comes to the active spot, which will act like a Float Stone.
That's a good idea, I found it more reliable than Silent Lab. I would go with a split line of energies between Water for Vileplume/Bunnelby and DCE for Vespiquen/Shaymin EX.