I think it could work the way punching currently works; left direction attack always uses the left hand, right direction attack always uses the right hand, and the up/down attacks depend on your stance. While southpaw up/down attacks are done with the left weapon and in orthodox with the right. If one of your weapons is incapable of thrusting but the other is, you always will use the thrusting weapon for down attacks. If you hold down the attack button to do a power attack, you will wind up with both weapons at once. For weapon selection, it would be simple; scrolling forward cycles your right hand weapon like it currently does and scrolling back cycles the left. If you're only carrying one one handed weapon then nothing is different.