2 suggestions that have worked for me (and my circles are pretty bad). Yellow concealer plus a concealer a little lighter than your skin tone on top of it. I use mineral makeup when I use this combination. Or have you tried prescriptives camoflauge cream concealer? I just got it and I love it! A good moisurizing eye cream might help too with the application of concealers. Hope that you can find something that works for you - it's such a pain!
Oh and less is more with concealers. Gobs doesn't always help
