No geometry motion blur with VRay Instancer

[im.thatoneguy]

I have an animated bug that I want motion blur on the wings of.

1) I tried instancing in PFlow and that failed.
2) I tried writing out a VrayMesh and loading proxies in Vray Instancer and that failed.
3) I tried writing out as an ABC and loading in vrayProxy in Vray Instancer and that failed.
4) I tried writing out as an xMesh and that kind of sort of worked but had lots of issues.

I'm out of ideas. Is there a way to get particles with geometry motion blur?