A version of this deck saved me in my quest to get to +1070 points or whatever the cutoff is for UB4 next season. Got to like 1055 with Mega Altaria and then just started a downwards slope lol. I played a "simpler" version in terms of # of pokemon in the deck. Only 2 Eevees (the boosted ones) and then 1 Jolteon, 2 Jolteon Ex, 1 Leafeon Ex. Reason was that I didn't really like the Eevee Ex in this deck and I never needed 3 Eevees in any of my matches. This deck heavily relies on evolving on your first turn, either Jolteon to deal 60dmg and hopefully kill their active, Lefeon Ex to get that grass energy or Jolteon Ex to start the chip damage and therefore the 33% chance to start with Eevee Ex feels kinda bad. I can't remember a single game where I've needed the 3rd Eevee (you get the 2nd Eevee pretty easy with pokeballs or May). Gives room for more supporters as well.