How do you expect someone over the Internet to be able to conclusively tell you whether or not you're going to feel some combination of drugs? I mean, that is enough to either feel like breathing to someone who normally takes 800mg of oxycodone and a bunch of Xanax every day or enough to nearly (if not actually) kill someone who has never taken any of them before. I honestly can't fathom how anyone could possibly take a swing at this with the information provided, and I can't really imagine how any information would be enough.
Perhaps you could provide a trip report?
Truth is, no matter what your tolerance level is it's never a good idea to mix opioids and benzos, let alone an opiate you've never done with another opioid and a benzo. Even at low doses... but what constitutes a high and low opiate dose is incredibly subjective. Boo I'm such a wet blanket but whatever. Wouldn't want some opioid naive 15-year-old lurker seeing this and thinking it's in any way a good idea just because Mom's got all three in the medicine chest.