Hi RED SOHI, welcome to AFN. The Infirmary section here is normally moderator only replies, but I read your question and wanted to offer something back because I have battled mites before and totally empathize with your situation.
The Predator mites, there are a couple species, are good, natural controls, but they are generally better for sweeping/maintenance on a low-order mite population. They would not be effective if you have a large infestation going on, and each species of predator only thrives within a certain bandwith of climate/humidity, so you have to match the right species to your environment. Again, I think they're a better countermeasure than offensive weapon at this point.
Malathion and/or other chems may or may not have adverse health effects, so I would never recommend that. If you were going to go ahead and use chemicals...I understand that the go to's would be No Pest hot shot strips or Floramite. You'd want to ventilate your growroom to the outside afterwards, and not fill your house with nasty fumes.
It looks like you're fairly far enough along in your grow you might just bunker down and accept that the plants are stressed and will not perform to their absolute potential but hey, you can still get a harvest that won't ruin your health with trace chemicals. If the mites are webbing all over the tops then you are in a fully blown infestation. I think some people have used a shop vac at that point to try and keep the numbers low.
It sounds like you have a persistent infestation you haven't been able to eradicate. A moderator with more experience can probably confirm this, but your best move forward would be to thoroughly clean your grow area after this run.
With mites, an ounce of prevention is worth a pound of cure. The Neem oil is great stuff but probably works better as a preventative--spray the plants at regular intervals while they are young or you can also drench into the medium with your waterings. It will ward them off, but maybe not so great once the problem is established.
Cleanliness is key in your growroom, and is recommended you should remove shoes, wash hands, change clothes, etc before entering when coming in from outside.
Also, in general, a healthy plant will naturally resist pests; problems with the plant and her rootzone tend to make them more susceptible. Improving your overall environment and technique will produce healthier plants with a greater degree of natural resistence.
It may also depend on the type of mites in your area. Some high-density growing regions have some pretty pesky, resilient mites that are hard to get rid of once established. I'm hearing bad stuff about one called rustic mite that started wreaking havoc on the West Coast this summer. I think for that reason that you should avoid visiting your friends' gardens and think twice about getting clones even from reputable dispensaries as seeds do not bring these risks to your door.
