We've had a few guys come through BL with massive bodies and massive habits (Binge_Artist for one). Athletes get injured all the time and have to go on pain medications.
If you really want to continue using oxycodone during an intense training period, just be sure that you keep the essentials going. By this, I mean eating enough food, drinking a lot of water, maintaining a healthy/regular sleep schedule, not missing days due to drug-related time commitments, and so on. Not eating enough (food typically would kill the high) was always my problem when juggling this. And missing gym sessions because the dopeman kept me waiting.
Sure, an opiate habit/addiction is not ideal for fitness enthusiasts, but ultimately we have to pick our battles and work for the best.
From personal experience, I really suggest that you minimise the back-and-forth thing between your opiate-of-choice and Suboxone. I never felt very good when doing this (having to wait for the WD to hit before taking the sub, my stomach getting upset from going back-and-forth, my bowels backing up to the point where it interfered with my lifting). If you've got the discipline to follow some crazy rotational opiate schedule, you've probably got the discipline to take progressively smaller doses to stretch your stash out.
I have also seen guys get sucked into taking opiates to numb the pain of body/muscle aches from lifting. I recall the episode of Locked Up Abroad where the smuggler was buying morphine along with his steroids while in Mexico and then got hopelessly addicted. I'd try and avoid establishing a thought patten about opiates taking away the pains of a hard gym session, since this can quickly get out-of-hand, and your once-innocent exercise hobby is not inextricably linked to your drug (ab)use.
Lift heavy, party responsibly, but try and keep the two as separate as possible.
