Okay, so I have two point lights in the scene with the same settings as shown here.

 

Shadow .7, Ray trace shadows on, shadow blur radius 20, shadow samples 25, shadow min bias .8

 

Ambient Occlusion On.

 

The Hair properties I changed the shading rate to .5 and I turned off Light Emitter.

 

Render settings:  2 bounces and 50 irradiance caching

 

Well, you can see.  I think it's worlds better, yeah?

 

Indirect Light Yes, Quality 80, pixel samples 6, Min shading rate .10