Hi Wolf,
As AintSoBad said, no one can predict the course of RSD. Some people end up worse than others. Regarding the medication you're on, are you upping the dose when your RSD gets worse or are you following a prescribed course? It took me a long time to find the correct dose for me which I maintain daily. I've noticed a huge difference in my RSD, and although the side effects are pretty horrendous, I'd much rather have that than the horrible pain I was in. It's finding the dose to suit you that's important.
You also mentioned nerve blocks. I get these regularly, every 6 weeks or so, and that, combined with my medication, means that my RSD is pretty much kept at bay. I do have days where it's bad, but on the whole the effect has been good.
Mirror therapy has had good and bad reviews I think. I have also tried this, but I have to say that it did nothing for me. It's all about tricking your brain, but unfortunately mine didn't want to be tricked. That's not to say that it wouldn't work for you. If you get a chance to try it you should take it up.
Take care
