WU Enchantments (why not ?) (Casual)

Hi everyone!
I recently looked in my collection and I came across Sovereigns of Lost Alara and Bruna, Light of Alabaster. I tought it was a pitty there was U in their mana cost because they would have been great (in my opinion) in a WG enchantement. I know enchantement is WG but I wanted to try something a bit unusual...
So there we are! WU enchantement! Before you treat me like an heretic, I must say this deck is not made to be competitive, it's just meant to be casual!

Let's start the analysis:
It's an enchantement deck so we need... enchantements (thx Cap'tain Obvious)
Here are the ones I choosed
-Ethereal Armor: just one of the best auras
-Pacifism: a control aura (if we make a WU, we should at least make it a bit control)
-Spirit Mantle: another great aura, no questions about it
-Pariah: more control aura.
-Infiltrator's Magemark: cause imblocable creatures on steroïd is cool in an aura deck
-Rhystic Study: can slow the opponent by making them pay their spells 1 more

Now we need creatures to enchant:
-Grand abolisher: protects you from counters
-Umbra Mystic: makes your creas more resistant
-Academy Researchers: cause it comes along with a free aura
-Ajani's chosen: allow to cast auras without having any board
-Stuffy Doll: only here to make Pariah worth a bit more with the combo Stuffy Doll+Pariah
-Sovereigns of Lost Alara: aura tutor
-Bruna, Light of Alabaster: just to make an aura overload at the end of the match

And finally, here are the spells:
-Aura Finesse: can save an aura from destruction if the creature it's attached to is destroyed
-Azorius Charm: versatile and useful instant
-Retether: cheap Replenish :)

That's it for trhe analysis. If you got any suggestion on how to improve this deck, feel free to post it in the comments and I will cosider it as soon as I have a bit of time. Just keep in mind I tryed to make it a bit of a budget deck (that's why I used Retether instead of Replenish).

Hope you liked it and see you next time! ;)