Hi Lawless,
i've only had spider mites a couple of times and luckily i managed to catch it both times before it turned into a full blown invasion.
what i found (and you prolly know already)

is that i needed to treat the whole life cycle. spraying your plants everyday is useful in getting down their numbers but does nothing to kill the eggs (which will hatch after you stop spraying and bingo you're back where you started) the other disadvantage of spraying for a whole week or so is that after a while the plants leaves get pretty tired and burnt.
a better strategy ( i found) was to spray one day, n give them a good soaking.
then the next day and the day after just spray them with water. (the borg hate damp, humid conditions and spraying water slows down there activityand gives you a chance to fight back, plus you can blast them off with a good jet of water ) then, the next day spray them with pesticide again and keep repeating the same pattern for a couple of weeks or until the eggs that were laid by the feckers you killed last week, hatch.
then blast them as well
that way your leaves get a chance to get over the last dose of pest off before you hit them again, plus the humidity you're creating slows down their munch/ fuck fest.
couple of points though. you need to keep your plants out from under the light while they're wet and let them stand for an hour or so. and dry off your buds by letting a fan waft over them before putting them back under the lights again (hopefully shaking the fuckers off in the process plus below a certain temp they become dormant so the cold air might just slow them up
you say you have more than one kind of parasite, unfortunately i don't know the conditions they thrive in so you need to check you're not killing off one type only to make it comfy for another kind
it might not work for everone but this method has stopped an invasion twice now
remember and spray off your final application of pesticide so as it doesn't affect the flavour of your bud
good luck whatever you choose to do, and kill a few thousand for me