If you don't mind self recs, a couple of mine satisfy 1) and 3). I can't do links from this iPad but they're pinned to the top of my journal.

In Vino Veritas

Wall of Death

Self recs are cool with me, I will go look them up, thanks :)

A couple favorite fics dealing with the mark of cain:

Too Long in the Wasteland (http://spn-summergen.livejournal.com/223429.html) by zara_zee: "The year is 2015 and Sam and Dean’s battle with the Mark of Cain is suddenly overshadowed by a series of catastrophic natural disasters that devastate the planet and irrevocably change life as we know it." (gen)

The Strength of Frenzy (http://spn-summergen.livejournal.com/218604.html?format=light) by katzenspn: "The Mark is so big on Dean's skinny arm." (gen)

Goat Dance (http://spn-summergen.livejournal.com/221268.html?format=light) by kalliel: "Sam, Dean, Taylor Swift, goats. It’s just that kind of day." (gen; this is a tag for 10x12, so Dean doesn't currently have the mark, but its effects are still heavily felt)

The Least Best Better (http://frozen-delight.livejournal.com/36722.html?format=light) by frozen_delight: "Who kills himself with a candlestick - there's about a billion better ways." (gen)

Pagliacci (http://archiveofourown.org/works/3201419) by anactoria: "Everybody loves a clown." (gen)

These all look awesome, can't wait to read them, thanks :)

I have a lot of recs, so I think it'll be best if you just go through the tags on my Delicious account. Ratings, seasons and appearing characters are all tagged, so you can choose which fics sound good to you.

- fics with hurt!Dean (https://delicious.com/hunenka/hurt!dean)

- casefics (https://delicious.com/hunenka/casefic)

- fics with the Mark of Cain (https://delicious.com/hunenka/mark!of!cain) (and if you don't mind self-recs, I wrote one short fic dealing with the Mark's effects on Dean here (http://archiveofourown.org/works/1515515).)

I don't mind self recs at all :) and I look forward to reading them, thanks.

lustraverse is an amazing set of casefics. It's an AU of season 9, where Sam completes the trials but doesn't die, and there are several episodes.

Thank you so much :)

#3, case fics:
I think these qualify.
Grass Don't Grow (http://supernaturalfic.livejournal.com/37602.html) by halcyon_shift
Children of Man (http://www.fanfiction.net/s/4638266/1/Children_of_Man) by Tajjas
Once a Bother (http://www.fanfiction.net/s/5513997/1/Once_A_Bother) by Tajjas
Pride and Pestilence (http://www.fanfiction.net/s/5586875/1/) by Celtic Amazon
In Eridu (http://takadainmate.livejournal.com/151022.html) by takadainmate
Contrapasso (http://takadainmate.livejournal.com/135103.html) by takadainmate
Cold Was the Ground (http://superbadgirl.livejournal.com/898591.html) by superbadgirl
Sense (http://rocksalt-recs.livejournal.com/131023.html) by gaelicspirit
Dolor Ibi Est (http://electricalgwen.dreamwidth.org/93460.html) by electricalgwen
Tin Soldier (https://www.fanfiction.net/s/5680282/1/Tin-Soldier) by 1shot
Ichneumon (http://spn-summergen.livejournal.com/221510.html) by ladykiki


#4, god!Dean:
I'd recommend these:
Next Stop Along Parnassus (http://archiveofourown.org/works/176587/chapters/259882) by Moorishflower
The Pie Bitch 'Verse (http://archiveofourown.org/series/31333) by TricksterShi
Named (http://www.fanfiction.net/s/6620318/1/Named) by mclachlan

And here's one I just found. Don't know if it's any good: Beyond the Ether (http://archiveofourown.org/works/1878309/chapters/4046001) by powerfulweak


#4, angel!Dean
Angel!Dean and Michael!Dean fics are pretty frequent requests here on spnstoryfinders (and it's no wonder, since it's a popular fic genre and I like the idea of angel!Dean myself). Here are a few places where you can find fics:
--My own rec list, which includes my favorite angel!Dean fics (those are at the top of the list): http://flatlanderjr.livejournal.com/5176.html
--The longest Michael!Dean fic list (with plenty more in the comments): http://aceofannwn.livejournal.com/20662.html
--This thread about dean turning into an angel fics: http://spnstoryfinders.livejournal.com/9928234.html#comments
--Every other request on this page seems to be for Michael!Dean or angel!Dean recs: http://spnstoryfinders.livejournal.com/tag/altered%3A%20vessel%21dean
--Or, if you want all the fics (good and bad, not just recs), try the Angel!Dean tag at An Archive of Our Own: http://archiveofourown.org/tags/Angel%20Dean/works


#5:
Would a demon!Dean story work?
Twelve Arches Facing the Sea (http://archiveofourown.org/works/2094555/chapters/4561185) by MajorEnglishEsquire

Thank you for all these fics, I will definitely read them and Deanmon is fine too :)

Well, since you said God!Dean has become an obsession, I guess you already read the Holy!Dean series (http://archiveofourown.org/series/29357)?

for Angel(ish)!Dean: (I didn't check with the other rec lists, so I might repeat something, sorry^^)
Lets Try This Again series (http://archiveofourown.org/series/37565): "A different take on what could've happened during season 5, where Dean's head goes kinda funny after Lucifer's Cage is opened and he has to decide what to do next."
Fusion (http://archiveofourown.org/works/3992446): Neither of them say ‘yes’. Everybody dies. Even the brothers die. And yet somehow, the pair go on breathing. AU Season 5 - Post 5.11 [Michael and Lucifer won't let the brothers die until they say 'yes'. Eventually they have no choice, but even then nothing is going to drag them apart.]
Theodicy (http://archiveofourown.org/works/372584): "As before, as now, as it will be again, the first significant Act of Creation by God shall be to forge l'hosif-or, his best-beloved, the Morning's Star, the one who shall bring the seeds of light into dark places and fan them to flame."
Fortunate Angel (http://archiveofourown.org/works/259991): "Post-S6 AU where Castiel turns Dean into an angel so that Dean will love him. The thing is, forcing someone to "love" you isn't all it's cracked up to be when neither of you are who you were. The title may be misleading, it's not a happy fic. Spoilers through 06x22."
Glory Unto: (http://archiveofourown.org/works/526245) "Castiel makes his first angel."
Once A Vessel (http://archiveofourown.org/works/529335): "If Castiel is going to be God, he needs an archangel and he sees the perfect candidate to be recreated right in front of him."
Ángelus Dómini (http://archiveofourown.org/works/3984196): "You're a fucking dick," Dean says, right to God's face."
Sympathy for the Devil series (http://archiveofourown.org/series/34621): "After the final Seal is broken, Dean discovers that he's actually Lucifer. He's not really sure how he feels about that."
Secret Weapon, Secret Family (http://archiveofourown.org/works/1174171/chapters/3661550): "Six months before his vessel was destined to be born, Michael met with a time displaced Dean Winchester. Realizing that Zachariah's plan to make Dean consent will never work, Michael develops a different strategy. Because if demons can insure Lucifer's vessel agreement, he, the mightiest of the archangels, can deal with a simple human child."
Godstiel and St.Dean series (http://archiveofourown.org/series/79402): "Bobby is the first to move, which is hardly surprising, as he isn’t affected by the Winchester lack of self-preservation instinct gene which is so dominant in their family. He kneels, encouraging the brothers to do the same. Then they finally get with the program and begin to move, because Cas just made Raphael go splat, holy shit. +++ My episode re-writes, in a universe where Cas remained God, didn't release Leviathans on the world and almost explode (but he did mess up in other ways)."

These all look great :)

(same anon from before, the comment got too long lol)


for #5 I have:
Symbiosis (http://archiveofourown.org/works/4662531): Dean needs to kill, or the Mark of Cain will kill him. Castiel needs to steal other angels' Grace in order to survive. They find a solution that solves both of their problems. (mid Season 10 AU)
The Missing Blade (http://archiveofourown.org/works/1336324): "The blade was gone but the Mark remembered it. Remembered how it felt to be grounded in fury and laser focused on the kill."
Oh, Green River (http://archiveofourown.org/works/3577494/chapters/7885800): "Dean, still fighting The Mark he turns to desperate measures. With a worn out manila folder in hand, Dean spits himself out in the wrong time. " (WIP, hasn't been updated quite a while)
Mark of Dean (http://archiveofourown.org/works/1390144/chapters/2911888): "Not brothers anymore? Fine. Fine - Dean ditches Baby, the Bunker, and his Angel. After calling Crowley, they strike a deal of sorts. He won't sell his soul to the demon, but maybe a soul isn't all he has of value these days. Crowley knows something's off, but while he works on figuring out what happened, he turns Dean into a BAFM weapon." (also WIP)

Awesome, thanks so much :)

Awesome, thanks so much :)