OP, if you're looking for epic later-seasons fic, there's Meet Me In Idaho (http://archiveofourown.org/works/1051339/chapters/2103613) (canon-divergent from 9.06)? It's Jossed now, but I remember enjoying it as it was being posted.
Also s9 era is These Forsaken Lands (http://archiveofourown.org/works/2398568/chapters/5302442), which picks up the aftermath of Cas's stint as God and IIRC is pretty angsty.
beenghosting (http://archiveofourown.org/users/beenghosting/pseuds/beenghosting) also gives good angst, and xylodemon (http://archiveofourown.org/users/xylodemon) writes a lot of episode codas that tend to be angsty and Destiel-flavoured.
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OP, if you're looking for epic later-seasons fic, there's Meet Me In Idaho (http://archiveofourown.org/works/1051339/chapters/2103613) (canon-divergent from 9.06)? It's Jossed now, but I remember enjoying it as it was being posted.
Also s9 era is These Forsaken Lands (http://archiveofourown.org/works/2398568/chapters/5302442), which picks up the aftermath of Cas's stint as God and IIRC is pretty angsty.
beenghosting (http://archiveofourown.org/users/beenghosting/pseuds/beenghosting) also gives good angst, and xylodemon (http://archiveofourown.org/users/xylodemon) writes a lot of episode codas that tend to be angsty and Destiel-flavoured.