Thank you for listening and for your comment!
For the drums, I think it's mostly because I'm not a big fan of "in your face big trailer-like drums" so I tend to give them the support role. I really like in particular tracks where the drums help transition from one part of the song to the other (I'm thinking of the drum parts in the Attack on Titan soundtrack). In this soundtrack in particular, I wanted them as an ostinato keeping the tempo in track for the other instruments to follow and also as an element helping increase that sense of space (the drum part in "Corridors of the Time Palace" for example is just a kick and a snare per measure with an echo effect + some high hats). I also would lie if I didn't say that I didn't simplify them and put them a bit more in the back due to lack of time to mix them in particular 😉