Hears, Frontline DOES kill earmites, even though it's advertised for fleas and ticks. I've seen evidence of it myself on two different dogs, both of which had horrible cases of earmites which nothing helped ... til I put them on Frontline. There's a fair chance Revolution would work, too, although since I've never used it, I can't say.
I never NEVER put the Frontline in the ears --- just applied on the back as suggested in the directions. Worked anyway! And was the only thing that worked for one of the pups, who'd been in and out of the vet for a couple of years for ear problems til I put him on Frontline.