I reckon there are three good problems up through the huecos, plus the r-l diagonal line finishing up the arete, and Percy's start on the left (the peak's hardest 6c+?) which can be linked into any of them.
The three all mantel onto the ledge and then crawl/ grovel off right, though the left-hand one, Chapel of rest, really needs to finish leftwards - the holds are there....
JA did em in in '86. twenty years ahead of the game.