Sit start with the lowest positive left sidepull and right hand on the arete with a positive thumb. Compress up the incredible line with building difficulty and pump.
This felt v9 to me, took about a dozen tries over a few sessions a season or two apart. The top Rh rail is probably skin and temp dependent, but it is an awesome (and difficult) climb whatever the grade. I had trouble reaching out left in the middle section so used the LH crimp on the face, maybe good for shorter folks? This took almost as much effort for me as Tim's arete this month so v9 doesn't seem nuts. Thanks Luke Z for the video.