I would also agree 25,000 a night is not worth it. I stayed there for 3 nights over the summer and was annoyed it cost me 16,000 a night. Especially when compared to the 10,000 a night I had spent for the much nicer Westin Dublin.
Maybe consider a cheaper hotel for a couple of days in Paris and use the points at Trianon Palace if you intend to go to Versailles. Also if you are going out on an early flight the day of your return the Charles de Gaulle Sherraton is a good use of points as well.