Sit start with a left downpull on the face and a right sidepull. Pull through tension and balance movement on sloping edges and sidepulls as you trend up through the arete. Top out up the slabbed section to the left. Generally considered in the 6/7 range.
For me, one of the hardest climbs I've done all season. Doing the big move from the good left foot was fine, but I kept getting stuck and couldn't move after that. Ended up having to use a worse, higher left foot and doing a drop knee instead. Felt 7 for me.