Seriously: If nothing else helps (and there were a lot of helpfull hints in this thread already), try to distort the timpany a little bit - in the sense of round, creamy tube-distortion and tape saturation. Our samples are extremely clean; a tad of nice unlinearities are something our ears really like to hear, bringing a signal up-front more easily. For our perception it has more "power" then.
HTH,
/Dietz - Vienna Symphonic Library
/Dietz - Vienna Symphonic Library