Re: Hair
Hair is mostly a character model and it was only really tweaked and made to look good with dynamic lights. I have never seen a project use static lighting for characters, unless you just mean the indirect lighting quality. Have you tried going from ILCQ_Point to ILCQ_Volume? That might help. But I still think hair was tweaked to have at least one dynamic or stationary light.
For static lighting, the specularity gets generalized into 3 lobes each spaced 60 degrees from eachother, and they don’t really have any positional accuracy.
For VR if you want GI you need static for the environment. At least for now.
If you are statically lighting an area, you would only place dynamic lights for dynamic things, like muzzle flashes or flashlights. You wouldn’t really try mixing dynamic spotlights and static fill, usually that would be more a stationary light which does the indirect matching.