In reply to philamina:
If reasonably fit and keen to do stuff in the upper Glacier Blanc basin (Dome de Neige / Barre / Roche Faurio / Louise) just do them from the Glacier Blanc hut - much nicer place to sleep and stay! This is what I’ve done most times I head up that way and it works nicely. The slog is then in the cool of the morning which is nice too, and it isn’t really that much of a slog anyway!
I’d second the Cineastes as a nice route to do for you if happy on rock. A similar, but slightly easier, proposition would be the dentes de costes counier above the refuge des bans. The hut is barely an hour from the car, so a perfect one to consider as a day route. Plenty of good bivi sites though if that’s preferred. May still need to carry axe etc for descent - not sure this year.
Another good shout for one with a bivi would be a traverse of the domes du monetier. Bivi at the eychauda lake then traverse and down via the glacier Blanc hut.
Personally I wouldn’t be inclined to do Coolidge from the glacier noir outside of spring... a long slog up a dry glacier.