Make sure your installer uses fine thread drywall screws -not normal coarse. They wont pop. I put over 2000 in my room with an impact driver. None popped.

Worst place for rattles was near corners. The silicone will smoosh completely flat. Just eliminates any flapping in the channel. With your layers not a concern. Your wall wont flex at all.

Here is a link for common wall assemblies

https://www.stcratings.com/assemblies.html#05

I think you would hit 60-65 or so with your plan.