From the first lip holds on Keen Roof, I think Dave S went right hand up to the crozzly diagonal crimp then a (big) flick though to a sharp edged crimp straight above, then to the jugs in the break. I have done it by going left hand first to a nice comfy scooped crimp up left of the starting holds, but not used on Keen Roof, then locked to the sharp edged crimp with my right hand before flicking through to the break with left. This is significantly easier than Dave's sequence, but it would be a tight line if the left crimp is eliminated.