Interesting deck. I definitely think, considering your curve, your land count should ne closer to 23-24. you could try adding Azorius Guildgate or other non-basic lands to make up the difference. Mesa Enchantress could definitely be useful in this deck. Heliod, God of the Sun could be fun, turning left over mana into enchantments, and kind of synergies with the sphere of saftey. I would also consider playing Hopeful Eidolon , Nyxborn Shieldmate or even Eidolon of Countless Battles then Cathedral Sanctifier . My final suggestions are Aerie Worshippers and God-Favored General as they make enchantment creatures making Ethereal Armor and Sphere of Safety more dangerous, and Arbiter of the Ideal As he can thin your deck and make more enchantments and Enchanted Evening again for the enchantment synergies.

nice idea for a deck, +1

looks great, but i recommend Artisan of Forms . she is just insane versus decks the use anything larger then a 1/1. and if you cant copiy anything of theirs you can just make a second spirit dancer, it is just about the craziest thing you can do for 1u . sadly she cant copy the bestow creatures while they are auras, still very much a scary thing to deal with.play her and the opponent just stops for fear of letting you copy an emrakul, or for a few style points you can copy Artisan of Kozilek , which i have done before...

You should try Enchanted Evening for even more power and toughness with Ethereal Armor

Its just my option but i think you need more creatures probably a bit more card draw so you can get to you creatures. Also taking into account that those creatures in the deck are not very good against very aggro decks. other then that its pretty good