New Angels and Dragons

Since this is a legacy deck, let's start of with mana production. You are using 2 Boros Garrison and 22 mountain/plains. These are going to be slow all around. Add 4 Cavern of Souls (2 for Angels, 2 for Dragons), 4 Clifftop Retreats, and 4 Sacred Foundries. That will still give you 12 basic land spots for the deck this size.

Sub a Sol Ring for the Boros Signet. 1 drop for 2 mana vs 2 drop for PAID 2 mana makes better sense.

20 of your creatures are 4 drop or more. This will be a problem in early/mid game. Think about putting 1-2 more small drop creatures in that you already have here (Outcast, Slumbering, Dragonspeak). If you don't get your lands coming quickly, game is over before you can get going.

Have lots of potential. Just have to tweak it a bit.