Rick I have not used wires but intend too. When I first started using support, I used fishing line for support in the beginning. I learned this from David at Barnyard Bees. I used both the X pattern and the two across horizontal pattern. These worked good, BUT; too be more assured bees 'will' draw the wax through the line, completed drawn out frames need to be placed on each side, to be used as a guide so the bees will not be detoured and help avoid drawing around the line, but through the line. This 'closes' the foundation less frames 'in' so to speak. This goes for skewers also in my experience. I like skewers as proposed by Paus better than fishing line, (Two spaced out vertically on a frame as you described). Though fishing line works fine, skewers are much stronger support than fishing line in my opinion.
Phillip