Following on from Liam, can I come?!?
Phantasialand offer a rather good FastTrack service, which I used on my visit there. They are fairly cheap and will save you a lot of time, especially for the larger and more popular attractions (mainly like Maus au Chocolat, Taron, Black Mamba, Winjas Fear & Force and Chiapas). The way the system works is you pay a set fee, and you use those passes on whatever rides you wish (that have a FastTrack queue line), so let's say you buy it, and you are given 6 passes, you don't have to use them just on yourself - you could have 3, and your mate has 3 as well. I'm not sure if I've made it sound confusing, but I can try and make it more 'understandable' if you wish!
I'd also recommend eating in the park, as there is a large range of food and drink to choose from, and at pricing to suit any budget (small or large). There are several 'grab & go' food outlets as well, so if you fancy eating on the go, or eating whilst watching Taron, or Chiapas whizz pass, its sure an opportunity you should take.
If you need any more tips or information about Phantasialand I am more than happy to assist, as it is one of my favorite parks!!
My final tip is, (dare I say it) is to watch the TPW vlogs, because as cringy as they are, you still get to set the 'yays' and 'nays' of the parks as well as the flaws, and spectacular areas. It also gives a good sense to what the parks will be like in person, and how the layout will be!
Once again, don't hesitate to ask any further questions, as I will be happy to help!