Hey there, let me start off by saying I'm by no means an expert and play almost exclusively casual EDH nowadays, but I have a few years under my belt now and I thought I'd weigh in. I'm under the impression this deck is for casual play and you'd like to stay on a budget, you can correct me if this is wrong, but I will gear my advice with this in mind. Lastly, this is your deck and you should by no means feel obligated to make any changes you don't want to, I offer only constructive criticism, so take from it what you like
The cards that should be removed:
Maze Glider- If we break down the deck, we can see that you really don't have many multicolor creatures. A second look shows that all of these creatures have flying and don't need Glider to give it to them
Maze Runner- As above, very few multicolored creatures. You'll find that by dropping this guy from the list, and subsequently the only thing that needs red mana, you can focus on Azorius colors which means fewer gates, fewer comes-into-play-tapped lands, and thus a faster start.
Wake the Reflections- Your tokens are all 1/1's and so paying one mana to make another 1/1 isn't really a deal. You could take these out for Sundering Growth which has the bonus of destroying an artifact or enchantment for one more mana, or you might take them out to put in more Doomed Travelers, Spectral Processions, or Judge's Familiars
Over time you'll find more efficient or more powerful flyers to replace the drakes and the Aven guys. They're fine, but there are better options if you go looking. Magiccards.info is a great resource that I use to look up cards. The advanced search lets you narrow things down based on whatever you're looking for, flyers, tokens, etc.
Now for cards to include:
First thing is first, more land! I may be a bit off base since I've been out of touch with 60 card magic for a while, but I'd say 23-24 is a good place to start. You hate to have Isperia in hand without the mana to cast her.
Here are some other ideas-
Lingering Souls, or if you don't want to buy them, Midnight Haunting- Not as good as Spectral Procession, but they do make flying tokens which this deck likes.
Intangible Virtue- Gives your little tokens +1/+1 and Vigilance. Can't go wrong here
Drogskol Captain- These guys are awesome. On color, inexpensive, and very strong. This is what I mean when I refer to a better, more efficient flyer
Oblivion Ring- Universal removal for three mana. These could replace the Avenging Arrows and the Angelic Edicts.
The last thing I would mention is consistency. Find the cards that work well and run three or four of them! This is especially relevant for cheap-mana cards like Doomed Traveler and some of the things I mentioned above, not so much for bombs like Isperia or Goldknight Redeemer.
Let me know if you have any questions and good luck with the deck!
