Do not sleep on Ajax, those dudes went so far ahead in champions league last year and they are playing Lille so I assume they will destroy them too, I would play either halves for them as well because they will probably score an early goal and then keep on attacking, Dutch football has always been focused on more attacks than defense so its a quite possible option to play 2.5 over as well.
With them reaching the semi-finals in last season's UEFA Champions League and only lost against Tottenham with away goals there is no doubt that they can defeat Lille in the Group Stage (They are currently 1-0 before even the end of the first half right now). But the thing is will they even reach the semi-finals this current season? They have sold three key players to three competitions namely De Light, De Jong, and Dolberg all of which contributed tremendously on their Champions League run. They still have a good starting eleven but I know the departures would really hurt especially when they start facing off Chelsea and Valencia in the group so just by looking at the group stage you will see they already have a rough start in this season.