You'll enjoy the monuments and architecture in Gambetta. You might want to make time for a stop at Seine or Caroussel Jules Verne.
Visitors to Cœur de Ville enjoy its restaurants, and if you want to do some exploring, Seine is worth a stop.
The cafes and theme parks make Faubourg de l'Arche worth a stop. Make a stop by Parc du Millenaire, and jump on the metro at Faubourg de l'Arche Tram Stop to get around the area.
When in Quartier de Bécon, you can plan a visit to Espace Champerret and CNIT, some noteworthy sights in the nearby area.