Arles is now on 20th place. This season they have goals difference 13-24 in 15 rounds played, it is averagely 2.46 goals per game. It is very low average.
Dijon is now on 2nd place. I think it will bve very dificult for Dijon to score more than one goal. This season Dijon play with averagely 1.87 goals per game.
As you can see both teams play with very little goals per game, so I bet on under 2.5 goals.