He really doesn't seem to change behavior based on his BG... the only times I've seen him acting like he really wasn't feeling well were at his initial diagnosis, when he had mild pancreatitis and came out of remission, and maybe when his ketones spiked last September. Other than that, he hits all the P's pretty routinely no matter what (antijinx!). ("Play" for him is mostly bullying the other cats, but I count it.)
When he starts a big dive he gets some regular LC at first, then MC if he goes below 80 or so to slow things down a little. MC/HC if needed once he levels off in the greens. We've got a pretty good system at this point.