Oh my gosh!
Yeah, I know it is really important not to scratch them. Even if they do finally heal after you stop scratching, then there is bad scarring.
OK, have you tried baby oil? I mean, slather your ankles, lower legs in it. It drowns them. Then also put it on your upper body too, but of course, too messy to slather it up there. Also, use the heaviest DEET you can handle.
Do you ever take an antihistamine, ie: liquid Benedryl to help with the itching? That's what we've done when it was the worst. Liquid Benedryl and the highest cortizone cream we could get our hands on.