Hi!
I’d suggest NOT to touch the ini file!! It was needed before 4.17 with no multibounce skylight and no portals…
IMO:
your bounce settings are way too high: after 10 bounces the rest will just mess up your lighting!!
If you want stronger/more detailed indirect shadows you should go around 0.6 with your smoothness setting!
And turn off compression on the lightmaps! That can also cause strange results…
For better result I would use an HDRI as the sky! With the default one you won’t get as nice and realistic results… not even close…