I have to agree that getting rid of Mentor of the Meek is the best option here. I also think that going down to 3 honor of the pure and 3 intangible virtue might help to not give you dead draws. Midnight haunting is a good replacement for those two spots. Otherwise i think i like the build, though your 5 drop is really tight and with no ramp, it might get awkward. (Elspeth, Gideon, Geist-Honored Monk) I played aganst a green/white token deck yesterday, and it definately had very little staying power if the board was wiped. I don't think Gideon is as essential to your strategy as the other 5 drops, I might even go up to 4 elspeth. Lastly, the oblivion ring suggestion is totally valid, you need a way to break through or get rid of things you aren't necessarily ready to deal with.