Re: Something needs to change - looking for suggestions
OT, I for one am certain that genetic mite tolerance is real, but very rare in unselected bees. You could stand to import some genetics that have the trait in a selected form. It would make a dramatic difference in the way you manage mites. Said another way, as long as you treat for mites, you will continue to have problems with mites.
NW Alabama, 46 years, 24 colonies and growing, sideliner, treatment free since 2005, 14 frame square Dadant broodnest