Have tried this off and on over a few visits and finally got the knacky, technical start figured out. It feels harder than The Cestrian to me, which Footwork reckons is correct at 7A+ but I think it could just be finding the right beta.
On the Prune Boulder, climb the wall just left of the huge overhanging prow, linking pockets with difficulty. Make urgent moves left along the top break to an emergency exit up Make My Heart Fly.
Nice, worthwhile highballing