Real quick, the third one I think what she's asking is Ed's already seeing someone else and is trying to hook Roy with another woman. However, Ed has feelings for Roy and shows him, but things didn't work out. Pretty much she wants you to do an angst Ed/Roy fic.

All right, I read all of the prompts and I think you should go for the Ed/Roy one if you don't feel comfortable writing the Roy/Olivier prompts. The first Roy/Olivier prompt I can maybe see them together in the end (I see that moreso as Olivier telling Roy he could still be her husband but won't hesitate a divorce if he does anything stupid to the baby, haha) while the second one not really.