It was pretty clear to me early on that this would get a recommend over here, simply because her first story that I read, "Saving Grace" had me pretty much turn all fan-boy on her ass (my top score is 5 ... that story received 4.75 ... something that I don't just hand out after picking at a story for review purposes ... if you're a Supernatural fan and haven't read it, yet, you're dismissed GO NOW AND DO SO).
I'm off wandering the YouTube and I've come across a very interesting experiment that I think actually worked very well.
Using clips from Supernatural and Angel, a story has been constructed in which Evil!Cordelia teams up with Lucifer to bring about Armageddon. In the meantime, before John Winchester dies, his big secret to Dean is that there is a secret half-brother that the boys never knew about. No, no, it isn't Adam (although Adam being changed into Adam would be interesting too - but that would be a Buffy crossover).
Not just any Wes, either, but down-in-despair Wes.
Anyway, the Winchesters have to unite to stop the apocalypse, with Lucifer knocking up Cordelia to bring forth the Anti-Christ. It's in 7 parts, so this is a multi-chapter link & the creator is: blueweasel1992.