Hi
I made a small map to test how meta compiled misc_models are clipped standing in two or more nodes at the same time.
It works quite well as you see but i think the pvs could be optimised.
I used hint brushes to fill the map space and cut them with the clipper.
If you want to you could try to optimise the portals.
You don't need to clip the hint brushes the way you do. You should only need at most 3 brushes for all the hints in that map. Using skip is generally a good idea.
Unfortunately, given the layout of those boxes up top, there isn't an efficient way of hinting them. What you have is about as good as it gets.