What’s a good value for cycles sun ?
I don’t know, look at some reference photo close to your subject and try to match contrast of lighting and reflection by tweaking sun and environment and exposure. I don’t know if there is a “good” value
In my experience using sun and sky usually result in flat looking pictures even if you tweek them. A decent hdri almost allways beats sun and sky.
yeah thats why i do sun + hdri with no sun