If you have time for a Verse, I too would rec Ratherastory- her Fusion Verse. It takes a new look at Sam and Hell with him coming out on his own, with issues, Dean has knee issues and has to have it fused and Castiel drops in when he can from the Heaven Civil War. I love the parts she writes with Castiel. It is a warm friendship with the boys and the other parts are great too. :)

http://ratherastory.livejournal.com/102813.html