Hi,
we are working with 4studioflashes (250Ws each), our setting is Iso100, aperture13, 0,5sec. shutter speed... as the cameras and flashes are synchronized, the shutter speed is not important, as our studio is quite dark. so the shutters are open, and the 4 flashes give enough illumination for sharp, bright photos. We are running a multicamerastudio with 48 DSLRs, scanning humans and pets. The biggest challenge was a shadow free light setting, we have experimented a lot with different flash positions, a combination of reflecting walls, white floor, indirect positioned flashes and a closed system does the job now without any light problems or black images...
all the best, good luck, Andreas from fabberlounge