I bought the online Paris museum pass and saw things I would not have paid for separately. Versailles is included. We saw the Unicorn tapestry at Cluny museum. Must see St. Chapelle. At muse Dorsey and Louvre we booked the 90 minute tour in English. Was great for both. You should plan to stay longer at Dorsey afterwards (30 extra minutes on your own should do it) but will have had almost enough of the Louvre after the tour. Walk around Le Marais- so many cute shops and restaurants. If you can get to Le Orangerie for the Monet room, it is worth the effort but you only need about 30 minutes for that museum.
We had a great meal at Le Parraudin for lunch (made a reservation) which was amazing and affordable near pantheon and Luxembourg gardens. Great dinner at Le antiquaries.
Even with the Paris pass you must schedule an entry time for Louvre and orangeries and the Dorsey .
If you have a tour and pass, you don’t need an entry time scheduled for Dorsay.
No matter what you schedule you will have a great trip!