Your list looks great! You have all the critical Angel's within reasonable budget. I especially like Aegis Angel and Resolute Archangel here. If you find you need another lifesaver consider Exquisite Archangel.

Since you like Mana Tithe you may also enjoy Rebuff the Wicked especially once your opponents start saving their removal for Avacyn.

Looks like fun!

Demonite

Thanks for the feedback! I am surprised with how well this deck has performed so far considering the budget I am working with. Anyways, I considered adding Exquisite Archangel but my problem right now is figuring out which cards to cut. I am considering cutting a Plains or two for some substitution, other than that, I am at a lost. Do you have any suggestions?

Maybe Guardian Seraph? They are both defensive creatures but in my experience Exquisite Archangel is a must-answer card that has greater impact on your life total.

Alternatively, maybe Angel of Glory's Rise? How often are you bringing back humans from your graveyard and are they worth it? It's also the same mana cost so you wouldn't be adding to your curve by swapping.

I think I may have to build an Angel tribal deck after seeing this list! The cards are powerful, have gorgeous art, and they can pack a punch!

Demonite

I think I will cut Guardian Seraph in favor of Exquisite Archangel. I like Angel of Glory's Rise because during one of my plat tests last night, I was able to bring back a bunch of humans such as Paragon of New Dawns and Grand Abolisher right before I played Avacyn, Angel of Hope

But ya, you should totally build Angel Tribal! I am thoroughly enjoying this deck so far.

Hey, I totally forgot to mention my favorite angel art of all time is a low cost (cmc and $) card that happens to do WORK in multiplayer in generating an Angelic army:

Luminarch Ascension

Fair warning though. It can paint a target on your head!