Mint0055 I'd just like to say thank you for such a thoughtful comment. I appreciate all your suggestions.

I find that the lifegain aspect, or atleast in my eyes, is underused in this deck. So the cards you suggested that prosper with lifegain are worth additions.

Cradle of Vitality: Amazing card, solid booster for my angels. A good replacement for Sublime Archangel

Angelic Accord: I find that it's harder to bypass its ability when compared to Luminarch Ascension. As all I have to do is gain life rather than not lose any. Plus it is far less to likely to make my opponents want to hit me.

Luminarch Ascension: As I said, easier to bypass. Yes, I can proliferate, but unless drawn and played early it may never get a counter to proliferate.

Entreat the Angels: It's an incredibly expensive manasink, and you suggested I cast it using Miracle, but issue is, if drawn early or too late, it becomes dead weight

Duelist Heritage: Solid addition, very potent and makes Atraxa incredibly scary (Giving her any sort of first strike makes her the most potent angel in the deck.)

Cathars Crusade: It works amazingly with token generators, yes, but the ones that I am willing to consider would greatly reduce the power of Cathars Crusade. Maybe 1 or 2 counters a turn (Excluding Proliferate) on existing creatures. Underwelming but a maybe.

Citadel Siege: Tapping a creature seems kinda redundant as chances are the opponent doesn't have enough flyers to stop me (If any at all), and the +1/+1's can only be placed on 1 creature.

Frontier Siege: Maybe. Only truly useful is Khans. Most of my angels are quite small relative to big common threats when they enter the battlefield. May be an include as it works well with Angelic Accord.

Sylvan Reclamation: Powerful card, provides draw if it becomes dead weight. Return to Dust may be better. We'll see which works best.

Necromantic Summons: Seems like a more expensive but more versatile Defy Death. A 50/50 it is.

Brilliant Spectrum: Painful Truth is better, cheaper, and you don't lose the cards you draw.

Tezzerets Gambit: Expensive, deck isn't focussed around proliferating, better alternatives.

Cultivate: Maybe....just maybe....

Rampant Growth: See Above

Map the Wastes: Bolster 1 is kinda bad as it targets the least powerful, which sometimes isn't the target I want it to be. (Plus it's kinda useless if I have no creatures in play.)

Everflowing Chalice: I had it in the deck before, had many people tell me it was a mistake removing it, so I may re-include it. It has its ups and downs, so it's a maybe.

Storage Lands: I don't like the storage lands as they are useless for colored-mana production when they enter the battlefield, require mana to get a single counter, require Atraxa to be in play...kinda underwhelming.

Alchemist's Refuge: Amazing card, worth considering greatly.

Removing cards:

Avacyn: She's amazingly powerful, has saved my life more than I'd like to admit (She "combos" well with Empyrial Archangel)

Akroma: Powerful angel, has haste and trample, base P/T is 6/6. Not to mention how she stops most single removal. She's been in play in almost all my games.

Sublime: She's been useful when it comes to getting through a crap ton of lifegian decks, as commander damage became my only real way of winning. But thats really the only time she's been useful. (I guess she's good if someone has crawlspace or Silent Arbiter) I'll consider removing her.

Sigarda: Honestly, she's in here to prevent Annihilator Triggers, Stax Decks, and Wasitora. She's also a 5/5 beater for 5, with hexproof. If her ability proves less than useful, she'll always be a good attacker/defender.

Fractured Identity: I agree it, in a multiplayer format, is a kind of hindrance to me. But I wouldn't replace it with Crackling Counterpart as it's an expensive Rite of Replication (More expensive altogether compared to Rite altogether.)

Once again. I'd like to thank you for your suggestions and comment overall. Thanks!

I personally think your cmc is too high as is and adding in Akroma's Memorial will only raise it higher. You need to add better ramp if you want to have a deck like this. Astral Cornucopia takes way too long to build up even with Atraxa out, Sylvan Scrying lets you find any land in your deck Burgeoning lets you play 2 lands a turn which ramps you out early game really well

this deck is perfect for a casual competitive edh game, I have a buddy who is a huge fan of angels and is going to faint over this decklist. good job on balancing this deck. might be a little light on control cards for countering but that can be overlooked for the mass amount of removal

You might like Vanquisher's Banner and Favorable Winds from Ixalan.