The treble winner is a big dream for PSG but they must maximize the Champions League to smooth their way. Their chances may increase as long as they can perform optimally in the remaining matches before entering the final and this is Luis Enrique's big target.
I don't follow Ligue 1 very much, but I was surprised by the difference of 22 points with 6 games remaining. This means that PSG has been confirmed to have 1 trophy. Other conditions in the UCL they are indeed able to focus, but some UCL matches PSG seem to have an opponent who I think is not strong enough. So I think they are lucky enough to be able to get to this phase. I also feel confident that they will be able to reach the semifinals. This is because their opponent is only Aston Villa. Currently in the EPL Aston Villa are in 7th place, even next season it seems that they will not qualify again for the UCL except for the UCL champions.
Ever since the season started, the games were basically just about "who would be the second place" type of deal, why? Because even at the very start of the season we saw that PSG would be the title winners and nothing changed since that moment which guaranteed their win.
Considering they are going to play against Reims on French cup as well, that is going to be probably quite easy for them. Obviously we have seen unlikelier things happen before, so we can't say it won't be the case, but we could probably see it happen much better for PSG and win that too. So what is left right now is only UCL and looking at how they played since the playoff stage, we can see them being great. However, they were terrible at group stage, so nothing is guaranteed yet.