I think I can call it now a success! thank you so much for your input! I used the parameters as per the screenshot, I also went to all the lights one by one and lowered the indirect lighting intensity, I also revised the parameters of the PostProcessVolume as per your suggestion!
Next step is to figure how to lower the direct sunlight that seems too intense, but I’m happy I’m getting a better grasp of the lighting! 
PS: this is a Production level render, this is what eventually solved the patches issue, but the real problem was with the extreme amount of lighting, and now both problems are solved Thanks again!