Like the classic Les Conquistadores (7b), but finish to the right of the tree with the edge and a good crimp. There is a bolt on top, if you want to practice on a rope first.
Rain sucks, but broken holds suck even more. Remember, never climb on wet rock in Fontainebleau.
The sandstone becomes brittle, and pulling on it will ruin classic problems. Drying it doesn't help, because it's still wet and weak inside.
All you can do is wait for better conditions.