RE: Possible Neo Miasma Sun? HGSS-on
Honestly your new decklist looks pretty solid, and you have a good grasp of the deck. What I question is how effective it's going to be in the new format at all. Your matchups from what I can see look like:
Serperior: With a burn flip you can OHKO off of two conditions, and three conditions guarantee you the knockout - exactly what you need to avoid getting completely locked. He's going to have to bring out his Zekroms against you to take early prizes, and just keep the rescues coming. I'd probably rate this 6-4 in your favour, maybe even.
Blastgatr: You have a bench load of free prizes and will have a hard time dealing 150 once he starts picking key pokemon. You'll have to double up Roserade _and_ Houndoom to stay alive, and that's a lot of setup before he wins. I'd say 6-4 for Blastoise; it's not that fast, so this could well happen.
Donchamp: This doesn't look THAT bad, but it sets up a lot faster than you do most of the time, being a guaranteed 60 on turn 2. If you can make the early damage happen, the game is yours; he has to get 2 champs to sweep. Definitely run Rescues to shore this up in case he does knock out your Espeon Prime with a loaded machamp left to finish you, as you have a hard time answering it otherwise. I'll actually call this even.
Zekrom: Ugh...that's not so good for you. He'll likely go off turn 1 or 2 and start hitting for 120 before you can start taking knockouts. Your best bet is to chump something to his first hit and try to do 100 on turn 2 off of a Roserade and a Rainbow. If you can get the turn 2 knockout going first, you can probably win. If he goes first it's a lost cause unless he fails to set up. 7-3 against you.
Still...I think it's possible for a Leafeon deck to become a serious contender. Will it be top tier? I have my doubts because of the Zekrom matchup. Will it be good? Definitely.
Honestly your new decklist looks pretty solid, and you have a good grasp of the deck. What I question is how effective it's going to be in the new format at all. Your matchups from what I can see look like:
Serperior: With a burn flip you can OHKO off of two conditions, and three conditions guarantee you the knockout - exactly what you need to avoid getting completely locked. He's going to have to bring out his Zekroms against you to take early prizes, and just keep the rescues coming. I'd probably rate this 6-4 in your favour, maybe even.
Blastgatr: You have a bench load of free prizes and will have a hard time dealing 150 once he starts picking key pokemon. You'll have to double up Roserade _and_ Houndoom to stay alive, and that's a lot of setup before he wins. I'd say 6-4 for Blastoise; it's not that fast, so this could well happen.
Donchamp: This doesn't look THAT bad, but it sets up a lot faster than you do most of the time, being a guaranteed 60 on turn 2. If you can make the early damage happen, the game is yours; he has to get 2 champs to sweep. Definitely run Rescues to shore this up in case he does knock out your Espeon Prime with a loaded machamp left to finish you, as you have a hard time answering it otherwise. I'll actually call this even.
Zekrom: Ugh...that's not so good for you. He'll likely go off turn 1 or 2 and start hitting for 120 before you can start taking knockouts. Your best bet is to chump something to his first hit and try to do 100 on turn 2 off of a Roserade and a Rainbow. If you can get the turn 2 knockout going first, you can probably win. If he goes first it's a lost cause unless he fails to set up. 7-3 against you.
Still...I think it's possible for a Leafeon deck to become a serious contender. Will it be top tier? I have my doubts because of the Zekrom matchup. Will it be good? Definitely.