Looking for a story where Micheal is Dean or at least has his grace. The pairings where Castiel/Dean and Gabriel/Sam. I can only remeber some scenes:

There was a group of hunters fighting demons and a dragon at the roadhouse.

Gabriel took sam on a hunt to kill a giant sea monster with his spear, sam does the killing.

Dean goes to Micheal'S house in heaven which is a dome like building, angels are sarting to gather outside it

The final battle takes place in Vegas

There's lots of wing grooming