FWIW, it has always struck me that the order of in which you run the spokes through the hub or to the rim doesn't make much difference, except for one thing. You do the head-out/spoke-in spokes first because you can't easily install a spoke-in spoke once anything else is strung to the rim. Beyond that, the differences of one approach to another are subtle conveniences. In the end you need to get them all rigged properly to their proper rim holes with the proper crossover and interlacing, and then you start tightening and truing. The only tricky part is making sure you start on the proper holes in the first place.