In reply to MG:
If you're reasonably fit, it's quite feasible to do the Paradiso in a oner from the valley. The path up from Pont to the VE hut is superbly stone-paved & graded, and gives easy steady walking by moonlight or torchlight. The blockfield between the hut and the glacier is a bit of a struggle, but there's usually a trench up the glacier once you're on it. Starting at midnight, I've done it up & back in under 12 hours (in my 50s), and I seem to remember from earlier UKC threads on the topic that other hardier folk had done it in significantly shorter time. If you time it right, that can also mean that you get to the summit rocks before the hut parties, who otherwise may create so much congestion that you can't reach the final point. Then you can sleep on the bus on your way back to Turin!
But it would certainly help if you're acclimatised beforehand.