What CH said seems generalizable. I and others I know taking low-medium doses (2mg a day, SL) can still get good bang-for-the-buck euphoria. The blockade at that level seems roughly equivalent to ordinary tolerance. Plus, it seems that if you still have enough of your previous bupe dose in you, then you can get high on full agonists, then go back to suboxone without any withdrawal, precipitated or otherwise.
I seriously think that you don't need to wait more than 24 at the levels you're talking about (I'm assuming you IV the oxy).
The "does Naloxone really do anything" issue: yes, IMO, pointless if you're just banging Suboxone.
But: one time I was so stuporous on methadone/heroin (say 100mg and/or several bags a day for a week) that I just shot up 2mg of suboxone without thinking. Of course, it instantly precipitated severe withdrawal. I assumed that it was the naloxone that did the worst -- it felt the same as being naltrexoned/narcaned at the hospital, and the worst of the precipitated wd's completely wore off after 1 hour (replaced by something like post-acute wd, lasting 1 day). I figured that was because naloxone had a short half-life. Doing it SL seems to actually cause longer precipitated withdrawal.
My thinking (later, when I could think) was that 2mg of Bupe certainly antagonized MOST of the heroin, throwing me into severe withdrawal, but that the naloxone still kicked off the rest of the H (not the Bupe). So it gave me an Ultra-Rapid detox for an hour or so...woulda been severe either way, naloxone just made it supersevere.
Or do you think it was Bupe the whole time that messed me up?