I'm a firm believer that spraying any combination of garden chemicals (pesticides/fungicides/bactericides) simultaneously isn't a good thing. I know that it's tempting to save some time by applying both at once but I think it's best to rotate treatments and spray one a few days after the other one.
As for your thrip problem, you could try spraying your plants (preferably at sunrise or it that's not possible, at dusk) with a solution of 1 tablespoon of ordinary hand dishwashing liquid mixed with a gallon of water. Hint: Add the soap AFTER you fill your container or sprayer and mix well.
When mixing soap solutions, always remember "LESS is MORE". Adding more soap than 1 tbsp. per gallon will NOT kill the thrips any quicker and may very well damage your tomato plants.
You'll need to do this for a few consecutive days to see any results. If this doesn't help control your thrip problem, you may have to bring out the big guns, like permethrin or another non-selective insecticide.