the Mighty produces vapor readily even at low temps and then before long the capsule is just spent and produces little to no vapor even if I crank the temp up.
this will vary, depending on the strain, age of the weed, and grind. IME some strains aren't done until I max out the temp, and others do what you describe: lots of clouds/flavor @ mid-temps, then nothing (except nasty-tasting hits) at high temps.
I'm just curious what folks are experiencing and how best to find the sweet spot of enjoyable vapor quality and efficient extraction
I start low (165ºC), usually get 2 tasty-but-cloudless hits, then step up the temp, usually 5º at a time, 2 hits @ each step. that sweet spot you describe (flavor + clouds) usually happens in the 175-185ºC range. I usually stay there for 3-4 hits - as long as there's clouds. depending on the weed, there might be more not-nasty-tasting clouds at higher temps - or not.
the low temps seem to get all the vapor the cap has in short order
I don't use the capsules, but people say they add a little conduction, so that makes sense.
the mighty's known for cool vapor, so you might try staying at lower temperatures a bit longer. those low-temp hits feel like nothing happened until you exhale: then it's pure flavor (and psychoactive).