Heh, if you read my post you can see that I've assumed "or" anyway. But yes. My mistake for misuing and/or... My point is that if you assume spikes or stealth rock, I can always assume rapid spin.
Admittedly I only half-read the rest of your post since you insist on continually using your own damage calculation/attack tier system that no one else uses to calculate anything. Obviously with the whole stealth rock->rapid spin and the inevitable counterarguments you get down to the point where you have to actually play Pokemon instead of theorycrafting about it, but unlike trying set up three layers of spikes getting one Stealth Rock off and getting Garchomp out before a Rapid Spin doesn't tend to be asking too much, IMO. Assuming the team is built around Chainchomp Stealth Rock is important enough to the strategy that you would probably be carrying the next move in the forum theorycraft game, 'Ghost switch in.'













