One option is to use 15s on the rear wheel on the non-drive side. It is supposed to make a more durable wheel.

"In short, there are fewer spoke failures by using swaged 14/15 gauge (1.8/2.0 mm) spokes than when straight 15 gauge or 14 gauge are used."

It is hard to have fewer failures than zero. Spoke superiorities are largely folkloric when the wheels are properly built using quality components that are a good fit to each other.