Jerry1,
Imuran (azathioprine) converts to 6MP. There is a test that can be done (blood) to test for deficiencies in TPMT. It's an enzyme needed for safely taking either azathioprine or 6MP. You can request the test and if you had trouble with the Imuran, they should have done it. Personally, I didn't have trouble so they didn't do it but I know many others who have. Aside from those 2 immunosuppressants...there are others. CellCept, Cyclosporine, Tacrolimus. I'd bring all these up to Dr. Schiff...I'm sure he'll bring them up to you being an expert in liver disease...he'll know! When's your appt?
Sounds like your numbers are pretty great..only a few numbers less and you'll definitely be in normal range no matter which lab is running your samples (they all vary for what are 'normal', that's why they usually show the range of their normal beside your values).
I know the pred sucks...on the plus side, once you get on an immunosuppressant (and it's fully on board--I think the others act quickly, I know CellCept does), they'll start to lower your dose. All my crappy side effects started going away when I got down to 10mg which was only 2 drops from where you're at...I had a small stop at 15mg on the way.
Good luck!