Did this today whilst trying in vain to warm up. Looks like the route Sinew Stretch HVS 5c climbs this arete kind of face on, hands on either side above a poorish landing, but if climbed staying round the left side at the start above a nice grass landing aiming for the obvious line of face holds its a decent problem with a frenchstart, or as I've done here with a full sitter. Christ knows about the grade, 6c is a complete guess, I was freezing and on my own.
I also did a version using the left arete of that face (avoiding the blocks on the other side left of the crack) frenchstarting to the face holds and up, probably 6bish.