just in reference to the last post, for large flange hubs i (and others) recommend, in general, fewer crosses. This allows a more moderate angle of incidence between the spoke nipple, eyelet, and spoke bed. ie, the spoke is allowed to create a less radically acute angle where it meets the rim.

I've built many mountain bike wheels, nearly all for disk equipped bikes, and i've always gone 3x. 4x requires longer spokes, and makes for a more jumbled looking wheel. i've found it harder to replace spokes on 4x wheels. i guess the decision is up to you, is the theoretical structural strength gain worth the longer (heavier) spokes and marginally more complex build?