Mixing/Mastering Music + SFX in a game

Hey all, I’m currently in the mixing stage of a game I’m doing audio for. I’ve found a lot of great resources, mainly from great answers to previous questions on here, for general loudness for games over long periods of gameplay and some general standards to shoot for.

I’m wondering if any folks have some guidelines they follow in terms of loudness and peak level of sfx vs music (there won’t be any VO in this game). I know this is extremely subjective, but wondering if anybody has a good starting point to aim for. I’d imagine I will use some techniques like sidechain compression or even like a spectral sidechain to try to help everything sit correctly, but still looking for some numbers to begin to aim for.