That Rolf tandem wheel is for 145mm dropouts. The aero-section rim is going to be too harsh for touring. Boutique wheels may be strong and reliable but they are not as repairable as traditional spoked wheels and damage to one spoke will throw the wheel out of true.
You should take the experts advice and use butted spokes. Laymen often assume that more metal makes a structure stronger but engineers realise that structures fail at their weakest point not their strongest point. If you remove metal from the strongpint, you can transfer stress away from the weakpoint and enhance the structure as a whole.