Here's my list that I've been using:
Creatures (8)
4 Fleecemane
4 Voice
Spells (26)
3 Jace
3 Detention sphere
3 Advent of the wurm
2 Selesnya charm
3 Sphinx revelation
2 Rapid hybrid
3 Azorius charm
2 Syncopate
3 Supreme verdict
2 Ratchet bomb
Lands (26)
4 Temple of Myst
4 Breeding pool
4 Temple garden
4 Hallowed fountain
3 Selesnya GG
2 Azorius GG
3 plains
1 forest
1 island
SB:
2 Dissolve
1 Essence scatter
1 Negate
3 Deadly recluse
2 Pithing needle
3 Divination
3 Heroes' reunion
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Points of note:
-3 sphinx rev/jace is necessary for combatting thoughtseize decks (you have to be able to topdeck card draw consistently to compete with their underworld connections/discard engine). I've tried 4 jace as well, it's okay (obviously better vs control, too much 4 mana clutter vs aggro)
-Hero's reunion is great for combatting fast red decks, and also midrange decks that still rely on heavy damage advantage to win (like red devotion with purphoros). It is better than the centaur because often times the body is irrelevant against the deck's weaknesses (stormbreath dragon, direct burn, desecration demon, unblockable from thassa, spectres).
-Spot removal is...spotty. Rapid hybridization is a great card to fill the void, and the downside is generally offset by advent of the wurm, verdict, and ratchet in a pinch (only if the ratchet is eliminating more tokens with it, such as master of waves tokens, pyro tokens, or opposing advent tokens).
-The mana is a real trick with only 1 scry land. When the next scrys come out, this deck will be quite alot better. I'd run max scry no matter what. But be prepared to be screwed on at least 1 color at least 20% of the time - it's perhaps the main reason bant can't be competitive with other mono decks, on a consistent basis. If you or anyone else has a good, viable solution to fix this, I am all ears.
-Deadly recluse is surprisingly good against a wide range of cards that bant is weak against. Namely, boros reckoner, stormbreath, desecration demon, nightveil spect. It also helps to have more 2 drops vs any white or red weenie decks, and it's a fallback plan for chandra's phoenix (though not a great option). I've considered running 1 immortal servitude SB with this and the other 2 drops, but it's hard to find room for it.
If you have any other suggestions, I am open, really trying to refine the bant concept as much as possible.