L to R R to L Alpha
Follow the line of bolts up the center of the buttress past numerous weird cruxes. There are often good rests. An intermediate anchor at 90' is a sensible place to stop, but you can continue on at 5.9+ through an exposed headwall. This will require two ropes or two lowers, unless you lower from a single bolt & quicklink at a point where things get low angle. From here, with backcleaning, you can lower off with a 70m rope, but it's probably a bad idea to use just one bolt as your anchor. Honestly, the "real" climbing ends at the first anchor, but the next stretch is pretty fun and makes for a long pitch.
At least 18 draws if you go all the way. A dozen or so to the first anchor.