A question about using exponential height fog

I’m trying to use an exponential height fog actor in my scene with volumetric fog enabled but I cannot find the right blend between density and extinction. Everything is either too foggy or there’s not enough fog to see the godrays. Has anyone found a good balance between the two?

Also, does anyone know if start distance affects volumetric fog because it doesn’t seem to do anything.

I am having the exact same issue. Looks like start distance is not doing anything with volumetric fog turned on.

There might applicable information in the video below:

Lighting Essential Concepts and Effects - Fog and Volumetric