Well, that's certainly good news. Though I've had little success with treatment, the couple of times that I've done corticosteroid tapers, I've responded pretty well, especially when I've been doing much worse than normal and need to kind of "reset". I've only taken Dexamethasone, but it's very similar to Prednisone.
So good luck with that--I hope it does the trick to break your current cycle of headaches. Frova (and other triptans) usually are used as a more commonly used abortive (it can be used 2-3 times a week, I think--though I think I might have heard that Frova may be able to be used more often than other triptans). If you still get fairly regular migraines (even if it's "only" like 5 or so a month), you should look at Frova regardless, since, as I'm sure you know, steroid treatment cannot be safely used on a regular basis.
Good luck :)
DX: NDPH, Recovered CRPS
RX: Lamictal, Provigil, Clonazepam, Ambien CR, Emsam, Namenda, Oxycontin, Oxycodone
PRN: Haloperidol, Zyprexa, Lodine, Zofran, Skelaxin