Mono White Angels because Kaalia, Zenith Seeker is for scrubs :) (what green I dont see any green)

The plan is super simple, jam everyones favourite flying ladies and beatdown in the air.

The Bishop of Wings and the Soul Warden act as early game plays and the nut draw of warden into bishop into Resplendent Angel gives you an extra 9 life and 7/7 worth of flying stats on turn 3, they also serves to keep your life total high enough the Speaker of the Heavens can reliably pump out angel tokens.

Shalai, Voice of Plenty does a reasonable job of protecting your board from targeted removal and the pump ability can be useful for forcing through that last bit of damage in longer games, she is the main reason we have access to green mana.

Linvala, Keeper of Silence and Containment Priest are meta calls to hedge against various decks. The Priest hedges out goblins looking to slam Muxus, Goblin Grandee, it shuts down Transmogrify effects and it counters all of those pesky Collected Company decks running around and finally it turns the Flicker of Fate in the sideboard into hard creature removal at instant speed.

Linvala likewise shuts down goblins turning off Skirk Prospector, (some of...) Conspicuous Snoop, Krenko, Mob Boss and preventing the cycling ability of Gempalm Incinerator. She also messes with any deck running mana dorks, she laughs in the face of Alseid of Life's Bounty or Selfless Savior and she shuts down a number of sac outlets be it Woe Strider or Priest of Forgotten Gods. she hits Scavenging Ooze, she hits Grim Lavamancer, I could go on but I'll just say shes just good.

Now we get to Lyra Dawnbringer what do I need to say about Lyra, shes a lord effect, she gives angles lifelink turning Resplendent Angel into an army in a can and with first strike she does a solid Baneslayer Angel impersination. The last of our angels is Angel of Vitality who exists mainly as a curve filler but she incidentally helps our lifegain plan and is quite often a 4/4 flyer for 3 which isn't bad if you ask me.

Finally we have Scroll of Avacyn, not much to say here, card draw in white and it often gains the 5 life, for full results pop it on your opponents turn to make an extra angel with Resplendent. 

As far as the Sideboard is concerned Settle the Wreckage is essentially a one sided board wipe just be careful about who you ramp with it, goblins love the deck thinning and the extra mana for example.

Heroic Intervention is self explanitory, think your going to get wrathed? bring it in.

Rest in Peace is one of the strongets graveyard hate pieces available in the format I'd put it above Grafdigger's Cage with the introduction of cards like God-Pharaoh's Gift and The Scarab God into the format, esspecially since we have containment priests to act as anti muxus shenanigans.

Wilt acts as a catch all against artifacts and enchantments be it Embercleave or any number of auras in the bogles decks (just removing Arcane Flight can sometimes be enough.)

Flicker of Fate is a reasonable tempo card at instant speed, it can devestate aura strategies and as mentiond with the priests it becomes removal. it's mainly here because i like to blink things.... (give me Flickerwisp Damnit)

Platinum Angel is there mainly because of flavour (and i like it) but it can be usefull in a surprising number of matchups if you manage to draw it.