Best Drugstore Concealer(s) for Acne?

The concealer I have now (Hard Candy Glamoflauge Concealer- which I was very excited to get after hearing so many positive reviews on) cakes up with the TINIEST ammount, doesn't cover my acne, and ends up wearing off throughout the day even with a primer. I need some opinions on the best drugstore concealers to my acne. I don't have a lot of it, I just need to cover a few problem areads. I've heard good things about the Revlon Photoready Concealer and the Jemma Kidd Mannequin Skin Illuminating Concealer. Any Suggestions???