Tiled Landscape and Actor Placement

I am using a tiled world with world composition. I would like to know the best practices in mesh and actor placement. For example, If I make village, Would I need to make sure everything is placed in the persistent level instead of the tile that it is located in? Since the tiles stream out at a distance. That is unless, when generating the landscape LODs it take that into account. I’m curious on what others have done, which methods help open world performance and visual fidelity.