The old way of dual wielding on a War/Archer was to change your class client sided, and now doing that results in a disconnect. But I doubt TQ actually made a server side check to see what you are trying to equip. Instead of changing the class to allow an offhand equip you could try to remove the restrictions on equipping items on the client side of things. - Remember don't give up on something because that is exactly what TQ wants, they think they're smarter than us.