Ok feedback from a mate who is a training Captain.
He was training a new to type f/o who is on sector 2. Arrive at holding point, no clearance. Stop, then gets clearance to line up. New f/o is now doing the line up checks in a hurry and forgetting one or two which my mate is pointing out whilst himself doing all the traditional airmanship duties associated with entering a runway. He found he was working hard.
Going back to the conditional clearance received to line up whilst still a little way to go to the holding point - he could chat the newbie through the checks on the taxyway and then enter a runway with his eyes outside.
However, I agree that multiple conditionals aren't needed.