Seamless transitions for complicated adaptive music systems

I have an adaptive music system where a parameter fades in different layers of the music based on how many enemies are locked onto you. The issue I’m running into is when I transition between levels, each level has it’s own music with it’s own adaptive audio systems that each have 7+ instruments that fade in and out dynamically. What’s the best way to seamlessly transition between these groups of dynamic music layers? For example if I have level 1 which has 7 tracks with it’s own paramaters and I want to transition into level 2 that has 8 tracks with it’s own parameters do I still just put all of it into one massive timeline on one event or is there a cleaner way when you’re working with dozens or more instruments.

Can you be more specific about the problems you encounter, and show some exemples?