One consideration as well is that 24/24 would be a sound way to eliminate 4 spokes without much loss in durability. Lace the rear wheel up triplet with a 32h hub and a 24h rim. Then do 16 spokes drive side and 8 spoke non-drive side. This will double the tension on the non-drive rear spokes and increase their durability. Since the drive side flange is offset, this is a reasonable way to build a rear wheel. Fulcrum/Campy have it goin' on.