Lighting fully dynamic/procedural real-world scenes

Unity's lighting systems seem heavily geared toward static scenes with baked lighting and reflection probes but if you create your 3d scenes at runtime (user-created/procedural content in code) these are of little use as you can not bake lighting or pre-place reflection probes (Reflection probes are not great for flat room areas & mirrors etc in any case!)

So until Unity adds a fully non-baked lighting pipeline what techniques have you used to make real-world content look good without a pre-lit setup? Particularly on lower-end systems

I have tried
- wrap-lighting (custom surface shader - simulates light bounce/ambience on low end system/mobile with limited light(s) by stretching lighting further around objects, problematic if mixed with shadow mapping)
- Noise in lighting pipeline (custom surface shader adjustments)
- Ambient Occlusion (but costly on lower powered systems)
- Planar reflections/mirrors (free solutions out there but require another scene render for mirror-view camera)
- Cubemap Reflections with generic noisy cubemaps for chrome-like materials

I have not properly tried LWRP as using 2018 but seemed still focused on static lighting setup