Darkest Before the Dawn (Book Five: Supernatural Fanfic)

Octavia Winchester is an Angel married to Sam Winchester, and has been for three entire years now, after they had given birth to their Nephilim twin daughters, Ariel and Faith Winchester. Octavia had used to be hexed by a spell that burned at her Grace and her sanity and nearly turned her into a mad killing machine, before they found the spell to reverse it and heal her, but is Ava really cured, or will she have some after effects from the hex?
And Ariel and Faith had been trapped over in the Apocalypse World with Jack and his brother Kai, and their grandmother Mary, fighting a losing war, and then come home only to have their uncle taken away by Michael, and Jack and Kai to lose their powers due to their father Lucifer.
Can they find and save Dean together, and finish Michael? Will Octavia be completely cured? How much have Ariel and Faith changed? And what happens if the family starts to lose Jack, including Kai?