In reply to Andy Lagan:
Agree with the Parat Seignier, another good route I've done.
There is also the Voie Rieffel/Fournier-Pain de Sucre on Des Perrons which is a good 300m at 5c+/6a. The setting is spectacular, and you can either abseil back down Squateur de Lune or walk off the back. You get to look over the Emosson Dam on the approach.
Another cracking route is the Voie Bron-Gamboni on the Tour des Crochues.
If you buy the Dulac/Perroux guide to the Aig Rouges, there is loads to go in there without having to worry about glacier travel.
If you fancy some limestone, then Le Petit Bargy near Reposoir is fantastic, routes upto 400m long. You would need transport to get there though.