One late sunset
The hardest part of getting this photo is that you must wait until 10 pm for the sun to set. And then wait for all the lights in the city to lit up.
In my opinion, if you go to Paris don’t climb up the Eiffel Tower it is not worth it. once you got up there you would not see it anymore. Suddenly, you are just in another stealth-tall structure with a huge crowd. I am not saying you shouldn’t go, if it has been your dream to do so, please do that. I am sure it is worth it for you.
To get this view you need to go to Montparnasse Tower. For 19 Euro, you can stay there till it closes. and it got a bar up to too. So you can just have a drink and chill waiting for the sun to set.
If you have a long lens like 70-200mm up, you can get some really cool detail close-up photos. Personally, I like to set my plan shot on a tripod and let it shoot. And then with my second camera with a long lens 70-350mm, I would zoom in and try to find interesting shots. (As below). If you zoom in closely, you will see there are so many people on top of the Eiffel Tower.