If yes, then 3xDS and 0xNDS is fine, as the wheelbuilder has suggested.
The 16H DS is equivalent to a 32H hub... 32/9=3.555555555...
The 0x(Radial)NDS will provide(help with) lateral stiffness and the 3xDS will provide good torque drive and elasticity...
Any disadvantages with 1xNDS?
Hi Orfitinho, the real question is are there any advantages to using 1xNDS in a 16:8 configuration... that is a good question...
Let's Theorise, for a moment... the Spokes will be longer and probably closer to 2x as they leave the hub flange (due to the wide spoke spacing which could be good re slightly better torque control), but would mean slightly less Lateral Stiffness (probably ok) and slightly less spoke tension (headroom to play with here).
Also, because the 16:8 NDS flange is widely spaced and the NDS spoke tension that is nearly equal to DS, then the slight reduction in NDS spoke tension might be beneficial in a 1xNDS 16:8 arrangement, because the spoke is pulling/lying non-radially over the flange. What this means is that you might be able to lace the NDS spokes heads-in rather than heads-out, which means you can use a less widely spaced NDS hub and improve BS(Bracing Angle/Lateral Stiffness for that Hub) at the same time... just a thought which is interesting, and perhaps worth a little more thought and study/consideration
Sounds like it could be worth a try, although it makes the build slightly more complex