Another thought, use the super high loft batting and pretend it is a Puff quilt which is supposed to be puffy.
https://www.shannonfabrics.com/downl...ePuffQuilt.pdf
Good luck with this quilt. I haven't been doing long arming that long, but my first thought would be to start in the center and work my way out along your seam lines. Diagonally first, then go back in and fill in the stars with a singular pattern. Or, just do a regular Pantograph and be ready to use your fingers to work any extra fabric down.