I have been going a bit back and forth between the last creation and the cistern, but i think this is the optimal build, although the scarcity of win-cons hurt a lot in the mirror. Celebration is really good as an undisruptable faeria-engine, especially against aggresive decks that can't do much with the extra ressources.
Be carefull with your land placement. The limiting factor with this deck is often having lands to place all the creatures and structures on. Medallion is the right pick with Fugoro most of the time. Without it the deck can have some trouble winning.
The deck is heavily favored against anything that isn't fast, like reaver, sac or crackthorn. It does pretty well into more aggresive midrange builds as well. Yellow rush is hard but winnable due to the plants. The only matchup that feels truly bad is RY Burn.
I played this deck in the last two opens and my record with it is 6-1.