3-leading 3-trailing compared to 3x wheel build

Nice to know it seemed solid enough, I'm tempted to try a 3-leading 3-trailing pattern on my new build (Rigida SX100 off fleabay and formula type hubs) , but being a fat bastard (and the rims being very low profile) I need something pretty strong.

do you think crossing that last spoke of the second cross may make for a stronger build too, I think crossing all the intersection would be a little harsh on the spokes.

I remember that during the build there were two issues.

If you don't cross at all what you are effectively building is a radial wheel with slack spokes and a twist applied and then another set of "radial" spokes with a twist applied in the opposite direction.
I was able to get the wheel true with no problem, but de-stressing the wheel, by laying it on the floor, pressing down on the rim, spinninging it around and repeating at 4 or 5 spots around the rim, just pressed the rim into a pringle.
This had never happened to me with a 3x build. The spokes are just too long to support the rim without crossing.

I stripped back the wheel and tried to rebuild with the spokes crossing at every intersection. Since I used a small flange hub, this proved impossible since the crossings were just too tight. The first crossing would be right on the flange.

The 1 cross per group of 6 spokes was an easy compromise and held up with no problems. If you moved to two crossings, as you suggest, it would all take place on one spoke (the one arrowed), which would shorten it quite a bit (you'd need to use one longer spoke to take this into account).

My gut feeling is that if you are heavy or hard on gear, then go 3x and then you just don't have to worry about the wheels. If you want to try it, the rim depth is not an issue and a lrge flange hub, like the Formula will give you a stronger build because you'll have shorter spokes and effectively more triangulation, both across the hub from left to right and from spoke group to spoke group (bigger gaps between spoke holes).

If it all goes wrong, tear it down and rebuild 3x, you've nothing to lose and a back wheel is not going to "fail" by folding up or anything scary. You just might snap a spoke head off and have the rebuild. I'd much rather have a rear wheel fail than a front wheel fail.