Originally Posted by
Retro Grouch
It's all about the angles rather than number of crosses. As you said, ideally you'd like for the spokes to enter the rim at a 90 degree angle but be tangent to the hub. You can't have both so you have to compromise. In general larger diameter hubs = fewer crosses. I'm thinking 2 cross for this build is going to work out just fine.
+1
Also consider that torque considerations are related to the spokes line of action and how far from the axle it passes. Often 2x or even 1x on a very large flange passes farther out than the diameter of a small flange hub.