You will need to use larger outlet boxes to accommodate the larger and
additional conductors especially if you will be going from box to box. 4
11/16" x 2 1/8" square boxes will work best. Check tables 314.16(A) and (B).
The number ten wires will be difficult to attach to wiring devices.

I'm planning on either using two two-gang boxes, or a single four-gang
box. I'm only entering 2 10's, and 6 12's, I think that just about
any two-gang has enough cubic inches to qualify for those.