Have you considered instancing the doors (left and right open) instead? When angles get as pronounced as this with high amount of screen realestate, especially of the materials have lots of glossy and low roughness, you should always consider doing it with geometry (Cycles). Using normal maps you can at close to glancing angles produce black responses from glossy, whereas with geometry it would get properly masked.
If doing overview shots only, then those black/darkened spots would be insignificant and I probably wouldn’t care. But for shots with door being big part of image, I’d do geometry based at least for grand angles. The door shown doesn’t appear to have 10000 verts, unless you plan to add lots of ornaments to it later.
I never have to do detailed “door works” in my projects so my doors tend to be vert friendly, and they’re also not the focus of what we do. But I still use instance groups to create them on a bigger office space.