Scooped at what frequencies? I think the Custom is pretty scooped in itself, especially if you start comparing it to other high output pickups.
I do think the Custom has some upper mid aggression... do you want to get rid of that?
Maybe the Dimebucker?
Also, FWIW, I tried the double-thick ceramic Custom when I had it, and I found it raised the lows, but not the highs. I always liked the Custom's agressive high-end and couldn't get along with the slightly thuddy low-end, but the double ceramic magnet made the problem worse for me.