doctorhydrogen

I'd find a slot for Dispatch, it would be a great value card in this deck.

For one more mana than Glory of Warfare you can run Dicate of Heliod which constantly gives all your dudes +2/+2 no matter what turn it is. Plus you can flash it in, which is actually kinda useful to bait blocks.

Also, in the interest of disclosure; part of the reason I'm such a fan of Homeward Path is because I used to run Avacyn in my Sigarda deck, and two games in a row I lost her within like ten seconds of her hitting the board and lost the game to her both times. From that moment on Homeward Path and me have been bros.

Glad to see Crackdown in this deck, it doesn't get enough play imo. I've sent it absolutely shut down some people.

I think the one more mana on Banishing Light is worth it over Journey to Nowhere since it lets you also hit artifacts, enchantments and planeswalkers.

I don't think Homeward Path is necessarily an auto-include. I don't run it in my Drana vampire tribal deck for example, because I'm not too worried someone is going to take her because they'd need black mana to pump her up and she's fairly easy to remove if so. Plus the deck functions just fine without her.

Avacyn though? A stolen Avacyn turns the tide from you having a 8/8 hard to remove evasive beatstick who makes your entire board indestructible to losing all of that and giving all of it to your opponent. That's a massive swing that effects every single thing. Being able to solve that problem by tapping a land is invaluable.

Any deck with Avacyn needs Homeward Path, and if you haven't needed Homeward Path yet it's because they people you're playing are too dumb for you to need to play Avacyn to beat :)

IMO any deck running Land Tax probably should be running Scroll Rack. It's a good card on it's own, but Racks/Tax is almost too good a combo to pass up.

I think it's worth the one extra mana on Wayfarer's Bauble to be able to put the land directly into play.

Deflecting Palm is going to do exactly the same thing as Captain's Maneuver for a lot less mana.

For one more mana than Gleam of Battle, Dictate of Heliod will constantly give all your dudes +2/+2.

Mana doublers flat out win games in mono-black. Cabal Coffers is god here. I'd find a slot for it, Vesuva to copy it, and Deserted Temple to untap them or Nykthos Shrine to Nyx.

Extraplanar Lens and Gauntlet of Power are great, too.

For one more mana than Doom Blade you can kill black creatures and/or Planeswalkers with a Hero's Downfall. The second you're staring at a Elspeth crapping out tokens keeping you from hitting her or a Thraximunder you need dead before you forces you to sacc your only blocker you'll with you had it.

I'd run Unstable Obelisk over Mind Stone. Being able to sacrifice it to destroy an artifact or enchantment that you have zero other ways to deal with is much more useful than being able to draw a card once.

Infernal Darkness is brutal in mono-black, too.

I run a Glissa deathtouch tribal deck that's similar (though more deathtouchy). Here's a few bargain suggestions:

Triangle of War- Another Executioner's Capsule-type repeatable kill effect

Viridian Longbow and/or Thornbite Staff- Both are resueable removal on any deathtoucher, but if you get both together you can basically chain-kill the entire board. Even if you don't have both out though just one alone is a serious threat.

Sylvok Replica- Repeatable enchantment/artifact removal

Urza's Bauble- Amazing card draw. I've pulled a dozen cards in a game off one before, at the cost of zero mana. I actually run both this and Mishra's Bauble, but Mishra's is like three bucks so wouldn't probably count as bargain.

IMO swap Naturalize for Deglamer or Unravel the Aether. There's too many Theros gods or Darksteel crap or graveyard shenanigans or on-death triggers to just destroy stuff if you can tuck it. Plus people running Sharuum or Mogis or Senn Triplets deserve to have their dude stuck in their deck :)

Tainted Wood is cheap and not as tempo killing as Terramorphic Expanse/Evolving Wilds or the Vivids. Jungle Hollow is probably better than them, too.

For only one more mana than Might of Oaks, Overwhelming Stampede could let you alpha strike multiple people in one go.

Druid's Repository is an absolute monster in Prossh. Being able to get 6 (or 8 or 10 or whatever) free mana for attacking with the kobolds you're about to sacrifice is fantastic and makes re-casting Prossh trivial.

I'd find a slot for Flamekin Village (and maybe even Hall of the Bandit Lord). Being able to haste up Prossh in a way that's difficult to remove can win games.

IMO Chromatic Lantern > Darksteel Ingot. Yeah, the indestructibility is great, but I can't think of a single time in a three color deck where I've thought "thank god that mana rock survived that Akroma's Vengence" or whatever, but I can think of dozens of times I've thought "thank god I have that Chromatic Lantern to fix my mana issues". It saved me from a Blood Moon in a deck just this week.

IMO Brushland and Sungrass Prairie are better than Arctic Flats since there's no tempo hit playing them.

I'd consider Lignify or Song of the Dryads in one of your white Pacifism effects. There's not a ton of protection from white stuff, but you don't want to be totally helpless against Akroma Angel of Fury, Animar, Blood Baron of Vizkopa, Phyrexian Crusader, Stormbreath Dragon, etc. or the two pro-white Swords.

Nykthos, Shrine to Nyx is more than likely going to kick a lot of mana in this deck.

Expedition Map is useful to find Cabal Coffers, or to find a Vesuva or Thespian's Stage to copy Coffers if you already have it.

There are few situations where Rise of the Dark Realms isn't gonna do more than Empty the Pits for similar mana cost.

Since you don't seem to be too worried about card price, Vindicate is going to do the same work as Oblivion Ring, plus it hits lands if need be, plus it can't be reversed via removal. If you don't wanna spend 20 bucks on a Vindicate then Utter End is still probably a better choice, IMO.

Homeward Path. There's nothing worse than having Avacyn taken from you and used against you. Myself, I'd run it an Expediction Map to tutor it if needed.

Nykthos, Shrine to Nyx would really take advantage of all those white mana symbols.

I have a friend who runs City of Brass in his Darien deck just to be able to make tokens on demand if need be. It always seems like a good play to me, but ymmv.

Seems like you'd often have a lot of white mana symbols in play to benefit from Nykthos, Shrine to Nyx.

Emeria the Sky Ruin would hit it's threshold pretty easily I'd imagine in this deck.

Crackdown can absolutely shut down some people if you're monowhite.

Even though it's sorc speed and not instant I'd much rather run Revoke Existence over Disenchant, but I see a ton of indestructible stuff and graveyard shenanigans where I play so exile > destroy by a huge, huge margin. That may not matter much where you're at.

I'd find room for Odric, he can flat out win games.

You'd also have a problem dealing with indestructible stuff here, though that may be largely a meta issue. At least where I play I have to deal with stuff like Purphoros in goblin and token decks crapping out huge damage, Nylea giving stompy stuff trample, Erebos locking down lifegain, etc. Green can deal with those easily with Deglamer and Unravel the Aether, and they have the added bonus of just being good enchantment and artifact removal.

As I said that may be largely a meta issue, but it's something to keep an eye out for.

Beast Within is also really nice as it hits everything. I personally would swap it for Hymn to Tourach, which is a great card in most formats but is kind of lackluster in EDH. I'd wager that 99% of the time you pull a Hymn you'd with it were Beast to deal with some threat sitting in play, and rarely will you draw Beast and wish it were a Hymn.

Aetherspouts is great . . . if you already have Cyclonic Rift and need a second answer. If you have to choose between the two I'd go Cyc Rift as it flat out ends games.

For one mana more than Go for the Throat you could run Putrefy and also hit artifacts and artifact creatures, or Hero's Downfall and also hit artifact creatures and Planeswalkers. It's worth the flexibility for one mana.

Gifts Ungiven is banned in EDH

I'd also consider maybe Ashes to Ashes over Reckless Spite. Sure, you lose instant speed, but it lets you hit black creatures (but not artifact) and it's an exile effect so there's no graveyard schenannigans and it'll deal with Avacyn, Theros gods, etc. It's probably meta dependent to be honest; I encounter a metric shit-tonne (official term) of indestructible dudes where I play, so I almost always prioritize exile over kill, but it may not matter where you play.

Chaos Warp is one of the few ways you can deal with enchantments in R/B. I'd find a slot over one as a Sphere of Safety or something could literally render a game unwinnable.

Flamekin Villiage is great haste enabler.

Wheel of Sun and Moon is great in Sisay. If people kill your dudes you can just tutor 'em again out of your library.

For one mana more than Suspension Field you can play Banishing Light which hits any creature regardless of size plus non-land permanents.

IMO Condemn is better than Devouring Light. When it comes to hitting commanders I'd rather tuck them than just exile them, and I've seen my buddy in a pinch use it to tuck his own Elesh Norn when someone goes to Path to Exile or Swords to Plowshares it and then pull it back with Sisay.

I'm a huge fan of Kor Haven in any deck that can run white. Yavimaya Hollow is hugely underrated, too, but you've got that already, because you're a goddamn champ.

Clever idea to run those sucky bands-with-other lands. 99.9999% of the time they're awful but I can see them being stupid good here.

I think you accidentally entered Helvault twice.

You're running 130 or so lands too many :)

Thrumming Stone is great in Athreos EDH, as is Remembrance

Considering you're running both Bruna and Replenish, Traumatize might not be a bad idea. If you have her out or it in hand it basically claps 15 or so enchantments into play. And worst case you can just mill half of someone else's deck.