interior lighting with unity 5.3/5.4 and enlighten

Hi anyone here that has a good tutorial on interior lighting with unity 5.3/5.4 and enlighten for a baked architectual interior GI setup.

I tried too setup my scene:

with one simple directional light as Sun. final gather and no final gather.

planes with a white unlit shader at the windows final gather and no final gather.

area lights at the windows. final gather and no final gather.

Whatever i try, i cant seem too get a somewhat decent looking GI lighting solution. i have used the default High resolution setting and also i tried a custom setting too blur the gi

example of my scene, with not very good lighting i dont think its the model or shading..?