The atmos is the default Vue7 atmos - no changes whatsover have been made to it.  So you can see that by just loading up that atmos.

While I do appreciate your willingness to help a smaller scene file IMO would be pointless as if it was smaller & less complex there wouldn't be any issues right?

The image was made in V7I so going back & redoing in V6I is a non starter.  That said you all can look at my gallery & see the images I've made in 6I & see the complexity there & realize in 6I preview renders were speedy - no more than 1-5m.  In 6I - rendering in final was no more than 30m-1 hour in 6I - using USER settings with high AA typically ran me 6 hours to overnight.  Only 1 image in my gallery took a week & that was during a 6I point patch when EON had a bum update out & when it was fixed I re-ran it & it ran overnight vs a week.

Lets keep in mind here I am in preview mode..........

Again I do appreciate everyone's willingness to help - I'm just not willing to dumb down a scene just so it will render fast(or for testing).  I could do that myself, but don't want to sacrfice my image for it & testing a smaller file would be futile & wouldn't really prove anything as it's not what I'm working on.