OK, in that spirit. OA is not "really" approved and/or effective for use during a nectar flow in any of the above forms. Trickle is best when the winter cluster starts. Depends on your climate and hemisphere, but for most in the North that is somewhere between late October and early December. Works best when the hive is broodless. Same for OA vapor, except you can use it in Spring, with the caveat that if there is capped brood, you need to do 3 treatments 5 days apart to get all of the mites inside the capped cells. Randy Oliver shop towels are experimental, so there are no official recommendations.
As far as mite counts go, alcohol wash is the most accurate and the most lethal. You will kill at least 300 bees by doing it. However, you may save 30,000 or more, and the queen is laying 2,000 per day in peak season, so perhaps the sacrifice is worth it. Aggressive treaters start treating when the mite count is 5%. Moderate start at 7 to 8%. Willing to risk problems leave it to 10%. Laissez-faire don't care and wouldn't count. I count and treat at 7-8%, but if I see crawlers or DWV around my hives, I treat sooner.
That was probably clear as mud, but please ask more if you think I could help.