Using substance and spheres, good tiling?

I’m trying to use substances in conjunction with spheres (using substance to create magical type orbs) but obviously with the UVs laid out there is some significant stretching and issues around the poles.

I guess ultimately I’d like to use a cubemap projection to get the texture to look real nice on the sphere, but I don’t see an easy way to pull that off. Any suggestions?

You could use vertex colors on your sphere using different flat uv projections and use your substance with a custom shader that apply the substance depending on the vertex colors, that could do the trick.