Group E final day is going to be wild.
They do have the benefit of playing on the last day of matches so they'll all have a sense of how many points it'll take to advance in third place, but right now it looks to me like Slovakia and Romania are best served by playing for a draw. Just looking at things now I think 4 points and an even GD is most likely enough, and Slovakia would be in that third place spot at an even GD. If both matches draw Ukraine is the odd one out on GD, so they're actually the only team in the group with incentive to win 3 points - and they have a tough assignment in Belgium.
That said, no guarantees so I'm sure all four will be playing to win, if only just to get in form for the knockouts.