If you are suffering from severe inter-dose withdrawal then I believe crossing over to Valium is a good idea because your motivation has to be strong to do this. Valium can present some challenges, it can cause uncomfortable sedation and depression until you acclimate to it, some members never do and go back to their original drug. If you think crossing over to Valium will minimize your symptoms you're misinformed, its still a benzo but what it will do is provide less inter-dose which means a smoother taper.
Are you writing down your symptoms and their severity to make your reduction decisions, following a set schedule isn't the best way to go about this, using your symptoms as a guide would be better so you don't have to up-dose if things get too rough.