In reply to DaveHK:
> I'm planning to do it running style. I did the Gran Paradiso normal route car to car in 4.48 but prepared for MB to potentially take twice as long. Hadn't really settled on a start time yet.
If you are hill fit then it's do-able in less than 10 hrs even for non Kilian mortals. Acclimatisation of course will make a big difference.
You still need to obviously plan your timings for the best snow conditions and matching your foot wear. You won't move fast if it's all gone to sugary porridge.
Navigation, know your route, even lower down. A full moon wouldn't be a bad thing. If you've got a good memory for relocating things, you can dump /hide a bit of food and water heading up. If you dump near the gouter hut or just above, make it orange flavoured and folk will just think it's some campers piss bottle and not touch it!!
The crecasse risk will vary and it certainly depends on what kind of summer there is. Ask for local knowledge nearer the day and in the office in town.