What is the most optimized way for using NavMesh in a large level?

Hello!

I am working on a project with a particularly large map in UE 4.27. I was wondering what is the best approach for the navigation for a large area with many AI. I read about Navigation Invoker’s but I have some questions in mind. I am trying to keep the project as optimized as possible so I was wondering, would it be better to use a one large static Nav Bounds Volume or a dynamic one with invokers attached to the AI/player? Here is a size reference:

Thanks for your input(s)!