This one is for a select audience but I mention it for those that might be interested:
Breaking a Slayer by Dark Rhiannonhttp://www.athenewolfe.com/justrewards/viewstory.php?sid=937
Author's summary: This is loosely based on BtVS "Who Are You" and "This Year's Girl" with lines from those and from Ats "Sanctuary," and other eps, however, I would call it AU because I've played bloody hell with the timelines. Dawn doesn't exist, Buffy hasn't slept with Riley yet, Spike's feelings are more pronounced, and events happen quite a bit differently than they did in either series. Buffy/Spike/Angel.
My comment: Faith switches bodies with Buffy in Who Are You and purposely wreaks havoc in her life, including exposing her 'body' to serious harm, rape, etc. Buffy, once she has her own body back is shattered and goes to Spike for help and is joined by Angel later. So it's a stark story, and if the idea of Angel involved too is a problem then it is not for you. But for those who like the three of them and can handle the hard stuff it's a great story. Let the 'buyer' beware, so to speak.