Raytracing Optomizations

A quick test in the cmd console using

r.RayTracing.ForceAllRayTracingEffects 0

and then

r.RayTracing.ForceAllRayTracingEffects 1

results in a difference of 90and 20 fps respectively! I know I want to enable RayTraced Reflections in my materials and also use RayTraced shadows. Raytraced Translucency is optional and will NOT be using RayTraced GI.

So what are some RayTrace Optimization strategies?

What is the best way of determining exactly what specific material or static mesh actor is contributing to most of the RayTracing bottleneck?

Can someone point me to a simple example of turning off RayTraced Reflection Roughness in a Material Graph?

And lastly do any Raytracing specific cVars in your DefaultEngine.ini override whatever is in your PostProcessVolume?

Thanks for any feedback!