For consideration and imho
Advice is:
If alcohol wash raw count is more than 9, continue treatment. 6 or less is best. (Assuming the wash is approx1/2 cup of bees).
The mites seen and counted now may be ones that just came out with all those drones you are seeing - which would have just recently emerged, with mites on their backs.
The numbers:
H2 looks good. Patience, now that the mites are off their back the hive should quickly recover under good conditions. Perhaps feed it syrup+patty to give it a boost. If it does not bounce back after that, then it is still inflicted with something ( virus, nosema, queen injured or sick or old )
H3 is borderline
H4 needs continue, 2 more treatments
H1 is unknown
My practice is if I am going to treat one hive in a yard for mites, I treat all the hives regardless and at same time. Bees and drones drift. Drones especially. Based on that, I would be treating all 4 for 2 more times at 3-4 days apart, starting immediately. H4 being the high marker at this point, wash H4 again 2 days after the extended treatments for confirmation of effectiveness of the final mite cleanup. Assuming the end results are on point, the hives will then be set for a blistering season.
H2 may really benefit from donations of 2 brood frames from the other hives. However do NOT do that until the final mite treatment and results across the board are satisfactory. For now, just give them some syrup and protein supplement (patty).
Glad to see the hives are on the upswing and healthy. These are signs that you are doing a great job at getting the mites off of them and out of the brood. Great work!
Hope that helps!
PS: The cranky bees are the oldest bees, which tend to be cantankerous. When the population flips, new young bees as the new brood emerges, the hives will significantly calm right down. Hang in there! Keep the smoker lit and lightly puff them back when you notice a bunch of bees aligned across the gaps between frames looking up at you.