Lucky for him
The CNR (w/gendarme) is a great example of a simulable (new word) route. The first few pitches are a bit much for an average leader to solo, but for the most part after that it's low 5th, if not 4th class climbing. When following, I usually leave my belay device attached to the rope, with a knot tied behind it. If the leader needs a belay, I can plug a few pieces and have him on in a matter of seconds.