I own a ghostrider-its the opposite of most guitars on this forum-set neck,fixed bridge,
mahogany body and short scale(24 3/4). Whatever works in a gibson style guitar will work in a ghostrider. If you like Duncans try a 59n and a JB or Custom combo. I use Di Marzios : Paf Joe(N) and a Breed(B).
Mahogany guitars are very thick sounding and pickups that sound harsh in other guitars work very well. Some questions: do you use really high gain sounds(death metal/shred)? Are you into a more traditional sound?