Mites don't crawl into the buds so if you do a decent trim on your buds all their webs and poops will be in the trim and your buds will be fine. Make oil from the trim and you can filter out the rest of the bad stuff.
If you usually hang branches to dry when cropping the bugs will climb up so I'd chop the whole plant and hang it so they all end up at the bottom of the upended stem. I just flat out refuse to spray anything on my plants once buds are forming so would rather fight the bugs by hand or with the vacuum to keep the numbers and damage down until I can crop.
I've never used predator mites but it can take a while for them to start making a dent in the bad mite population. They have to breed and hatch more soldiers too so it will take a while before their numbers are high enough to kill off the bad ones.
If you have had mites or other bugs in a grow room and can leave it empty for at least a couple weeks then keep the temps up to 90F any eggs will hatch and the babies will starve to death without plants to feed and breed on. Make sure to keep bags of soil out of your grow space t all times as they are often the source of bugs like fungus gnats, thrips and mites.
Good luck!
