In reply to Dan Arkle:
La Baleine sector has many routes in the 7's, most of which are pretty long - 1984 is great and goes on for 40m, onsightable but a bit pumpy. There's a downloadable topo for this sector called St Leger Additif 2013.pdf. De La Houle Du Grain is great but hard for 7c.
At sector Andalouse I remember enjoying Mano Negra as it is varied
All the 6's that I've done at St. Leger have been good as well both the two and three star routes