Renderimg of this scene is taking hours and hours and still does not finishes even on 1280 X 720.
Have you tried reaching out on the Chaos Group’s Vray forum. You’ll get mostly Vray users looking at your post.
I could not find the page. Could you send me the link .
Try changing up the gi settings. Use irradiance map and light cache rather that brute force and ir. Brute force creates truer reflections, but almost triples my rendering times. Could help.