In reply to JAMES K: I wouldn't myself start too early, as the crux pitch is the first one, and then you got the s-crack right after, so unless you like suffering you might as well wait for the sun to warm the face. People start climbing around 9am.
You could head down and take pole position, and have breakfast slowly while you gear up, and start climbing when you think is ok. This is really your choice.
If you go down very early you will need an axe, as the trail will be frozen, i personally don't take either, but i wouldn't advise you to do that. As of taking an axe or a walking pole is only for you to decide. I don't know how confident you are on snow and don't want to advise you to do something that may result in you injuring yourself. Taking an axe over a pole is only a 300g saving, so your call.
To get back to the Midi you have to climb the summit boulder via a bolt ladder on the right, then follow a short slab to the top. Use one of several insitu spikes to do a diagonal 20m abseil and then you cross a 5m snow arette to reach the rail of the walkway. Jump in and smile to the dozens of japanese tourists that'll be taking photos of you while americans try to shake your hand.