Okay, guys,
most of you probably know that fact,
but still there are many new players here so here is it:
I did some research and found out that there is a connection between Duncraig and Kurast 3000 B.A. map rolls. I guess I won't be wrong if I say that many people prefer farming Duncraig with old map roll (with Assur in the left room and narrow passage right near the entrance). So I did a pack of runs, and by 11 of 11 times an old Duncraig map matched new K3KBA map (when you appear on the left bottom of the map), thus I'm 99% sure that it has always been like this and it's not just insane randomness. So if you're up for farming Duncraig for SU's/sets/trophy with old map roll, just quickly go to Spider Forest waypoint, enter Kurast and you'll find out what variant of Dunc map you are about to enter (new Kurast map -> old Dunc map and vice versa). If you're looking for Duncraig trophy, I guess it's much better looking for it in the old Dunc map