So they were actually gone for about a month until i noticed them again just today. AntiStress 2000 doesn't seem to work the wonders all the other threads I have read on it have alleged - albeit those are all from 2009. Now they have spread to my palm tree seedlings too

I sprayed the rest of my spinosad mix. If that doesn't do much then I think I will try predators from here
SPIDER MITE PREDATORS FACT SHEET & Release Instructions
I don't really like the idea of spraying chemicals on these things, but i think that will be a last resort. I wanna try the predators before I spray the plants with something that will kill them off instead of/in addition to the spider mites, because I have a good feeling I know which ones will come back after that -_-