keep in mind that you're building bicycle wheels, not making baskets.

Regardless of the pattern, it only makes sense to weave the last cross. The weave puts a slight bend into each spoke, and allows them to transfer load between the mated pairs. This improves resiliency, and increases the deflection working range.

Weaving more than once brings the weave too close to the hub and creates excessive bending. For this reason many builders who build 1 and 2x patterns don't weave at all.

BTW- while I don't believe there's any mechanical advantage (and often disadvantages) in exotic lacing patterns, I salute those who dabble in them just for the heck of it. There's nothing wrong with doing something different, even (especially) if only for the cool factor.