Although you didn't ask, let me give some info on the Ravens:
Original (Particle Pearl)
I have the least # of games on this ball out of the 3. Very even rolling ball, I would put the oil handling capability between the Attack and the Invasion, and the smoothest backend of the 3.
Raven Invasion (Pearl Resin)
House shot and shorter pattern killer. Although a pearl, ball is NOT jumpy and controls the mids very well.
I do bowl in one house that has synthetics, and the combo of the pattern and the surface does not provide enough friction for this ball to be effective.
Raven Attack:
Handles the most oil out of the 3 (for me). Ball is strong, has more backend than the Raven but not as quick off the spot as the Invasion.
Still needs some friction on longer patterns or synthetic surfaces.
For the one house I bowl in that is synthetics, to start out, I have a New Breed Solid that I start with. With that said, the Ravens are great pieces for heavier mediums and lighter medium patterns. Short to medium length patterns are good to go as well.