I've just been struggling to find a suitable scale for Bad Co, Can't Get Enough and nothing seems to work very well since the lower of the two guitars plays C Bb A F and Eb and the higher guiitar plays E D C A G, for the first part then its pretty much C major. CMixolydian is Ok provided you bens the Eb up pretty quick.
Anyway the long and the short of it is we need Minor Blues and Major Blues adding to those modes pretty quickly.