Overnight stays on the mountain are not mandatory, but they can change the pace. If you stay at the foot of the mountain, allow plenty of time for cable cars, walking, and not rushing down.
Measure the route by stamina
Stone steps, elevation differences, crowds, and weather are more important than simple distances. The route should match the weakest member of the team.
Keep the sunrise anticipation flexible
Sunrise depends on the weather and timing. Treat it as possible, not the only reason for a successful journey.