I would rather tech a giant stump or two. But to answer your question, any decks with A) energy acceleration that pulls energies from the discard, B) energy manipulation, or C) Super Scoop Up could probably fit a 1-1 Blissey line comfortably. Also, anything with a strategy that relies on setting up and tanking one or two big EXes like Flygon or Dragonite might find Blissey useful. The deck could look like this: 2-2 Altaria EX, 1-1 Fearow, 1-1 Blissey EX, big line of the big EX pokemon of your choice.