Ummm… sorry sir… do you understand what you’re talking about?
With 5 layers you’re already down from 120 FPS to 60 FPS (That’s only bare terrain yet). With adding another 5 layers which is the point of this thread, that 60 FPS is down to like 5 FPS (still bare terrain) without anything being placed on it to optimize. And you’re asking us to “optimize and sacrifice” with what?
Virtual Texturing is a thing… please read the papers.