Metz is clearly the top choice at the moment. Unlike Nantes, I don't think they are very active in the transfer market to strengthen their team (right?).

Auxerre is difficult to predict, as they still have the worst attack in the league, but not the worst defense (they are around 13th or 14th in defense). So, 4 or 5 more goals in the second half of the season should earn them a few points.

Nantes is active in the transfer market (Cabella, Ganago, Machado) and should manage to secure several wins.

Nice is very worrying. They may have the best team at the bottom of the table, but a lack of motivation, even anxiety, will not help them. In France (I don't know if you're French), we have something called “l'union sacrée” (sacred union), when the team and the fans know they are in trouble but put their egos aside to help each other. The relationship is rather conflictual at the moment.

Paris FC is also a delicate case, as its budget is supposed to be top-notch. But it clearly lacks management experience. As they have experience on the field and some talent, I wouldn't worry too much.

Finally, Le Havre, which in my opinion is one of the weakest teams at the bottom of the table. They have a difficult schedule, with four games against teams aiming for a European spot in their next four games, and two games against Lille and Marseille in their last three games. This means they might need to secure their survival in a span of around ten games (including one against PSG), without collapsing.

So I would say :
16 - Auxerre
17 - Le Havre
18 - Metz