thats a frigging brilliant little grow. plants look quite happy and well trained. the mites can't do much harm in these last 2 or 3 weeks, cutting infested branches out will just make the mites infest other parts. once you have them it's best to just spray with neem, lavender what ever. i noticed that they will often stay on one strain or pheno and leave the rest alone. but if you take their favorite out they will concentrate on the next ones. you should set up a plate with some eucalyptus oil in it and place it near the plants, they frigging hate that shit and will not be as comfortable reproducing away.