In my experience, 150mg of Diazepam is roughly equal to 8mg alprazolam. I'd go with 4-5mg Alprazolam and maybe 80mg Diazepam. Start with the Vals, and then start adding the bars until you get where you want to be. I'm in the same boat my friend. Benzos just don't touch me like they used to, after kicking Methadone I seem to have replaced my opiate habit for a benzo habit, which is quite possibly worse. As I detox my Subs I seem to take more and more Benzos. 6-8mg alprazolam gets me well. And I'm afraid to take a recreational dose for fear of further raising my ungodly tolerance, due to the fact that I need the meds for therapeutic purposes, and to simply function at this point, which I recognize has gotten out of control.