I climbed south ridge of Atwell about 15 years ago with Richard Fabishe, Chris Rowe and Vance Colbert, best climbed when there still snow on the face. We did it with minimal snow the south and west face have the consistency of a vertical beach. Climbing is really easy and no harder than 5.6 or may be 5.7 but after the snow melts expect no protection. I seem to remember that the rock crumbles in you hand and the rope sending large boulders trundling down slope at Rinharde, “so best to lead”. The summit is a 30 metre or so spike of unstable disintegrating rubble good for getting your adrenalin pumping. We descended by traversing to Garibaldi and walk a down a snow covered ridge not so hard.