Well, since it furthers the discussion anyhow, let's share what I've set up at the moment:
****** Pokémon Trading Card Game Deck List ******
Pokémon - 16
2 Miltank FLF 83
2 Shaymin-EX ROS 77
4 Snivy FAC 5
3 Servine FAC 6
3 Serperior FAC 7
1 Spinarak AOR 5
1 Ariados AOR 6
Trainer Cards - 38
1 Pokémon Fan Club FAC 107
1 Super Rod DRV 20
2 Trainers' Mail ROS 92
1 Lysandre FLF 90
1 Skyla BKP 122
1 Professor's Letter BKT 146
4 Battle Compressor Team Flare Gear PHF 92
4 Forest of Giant Plants AOR 74
1 Level Ball AOR 76
4 Revitalizer GEN 70
2 N FAC 105
1 AZ PHF 91
4 Ultra Ball FAC 113
4 Professor Sycamore XY 122
3 Muscle Band XY 121
4 VS Seeker PHF 109
Energy - 6
6 Grass Energy BLW 105
Total Cards: - 60
****** Deck List Generated by Pokémon TCG Online
www.pokemon.com/TCGO ******
Time to justify my choices, woo! Wall of text incoming!
4-3-3 Serperior - 3 Servine seems a little low perhaps, but this deck focuses very heavily on the Battle Compressor/Revitalizer combo so I never found it to be too few. I will probably test a 4th one over a Miltank though, cause that ability IS super dirty. 3 Serperior is the right amount to use since as stated above you get them back anyhow.
1-1 Ariados - Ariados is mostly to hit the 130 mark with Coil, or to hit 110 with an unboosted Slashing Strike + Band. It's not mandatory though, so 1-1 is all you need.
4/1 Ultra/Level Ball - Honestly I need to test alternating counts, but my logic behind this was that I play pretty much as many mons that can't be searched by Level Ball as by Ultra Ball, and I want to draw more cards T1. I can recover grass types that I discard, and I really need to hit FoGP on the first turn so I want to be using a Shaymin along the way.
4 Battle Compressor - The 4th one is mostly for consistency. the more mons I can dump out of my deck T1, the more other cards I can draw. Plus it helps dump Skyla/Fan Club in the discard.
2 Trainer's Mail - Mostly to try and get Battle Compressor T1, but can also occasionally snatch other goodies like Fan Club and FoGP, which this deck cannot really function without on T1.
4 Sycamore/2 N - This is mostly because I want to be drawing as many cards as possible within the first couple of turns. My goal is to get 2 Serperior up at least within the first 2 turns of the game, preferably with at least 1 Muscle Band, so I need to draw a lot to achieve that. Plus I only have 6 energy, so it can be tricky to draw into them sometimes. N outclasses Birch at every stage of the game imo, so I'm not playing him anymore.
1 Skyla/0 Teammates - I haven't yet had the time to test Teammates, but I can see the appeal in this deck and it's something I may try over a Sycamore soon. 1 Skyla is imo sufficient, as you don't really want to be playing it on the first turn and I find it to generally be too slow in a Stage 2 deck not running Rare Candy. I keep it around for when I need to snatch up FoGP though.
1 Fan Club/0 Bridgette - Honestly Bridgette is probably the better option for this deck... EXCEPT that it can't get Shaymin. That fact alone is the sole reason to use Fan Club for me. However, I should probably test Bridgette out sometime, since I do run lots of Sycamore and N for drawing beyond Skyla.
0 Xerosic/Hex Maniac - Honestly I just can't justify these cards most of the time in any deck. They're incredible, and tbh I kinda want them, but they absolutely destroy my consistency to the point where I just can't get going in more matches than I care to admit. This is mostly just a personal thing, because I am typically very unlucky with TCGO card draws (4 VS seeker's in my opening hand, woo!), but I just can't work with them enough.
1 Lysandre/1 AZ - 1 Lysandre is kinda ok. Would be nice to have 2 for Shaymin sniping, but oh well. AZ is kinda my only way to reuse Servine's ability, which is maybe a bit of a problem... but I don't have space for Devo Sprays so this will have to do. AZ's generically useful for picking up Shaymin too, hence I have that over a single spray.
1 Professor's Letter/1 Super Rod/6 Grass Energy - 6 Energy is low in theory, but with every attacker being a 1-energy attacker having many more than this typically clogs my deck up. Super Rod is pretty good for recovering spent Miltank/Shaymin as well as these energy if you have to Sycamore a couple at the start of the game, as well as getting some Snivy pieces back when you run low on Revitalisers. Professor's Letter over a 7th energy makes a lot of sense with Skyla and Battle Compressor.
Overall this deck runs super smoothly, but I don't play that many games so I haven't really tested this all that much against actual decks. I guess the main concern with this compared to what you guys seem to be playing is that I can't reuse Servine very much, but as far as streaming attackers go I'm golden.