I haven't done this myself, I got my bestiary there with regular hunts. But you should probably find a spot underground, where there are mor Mirror Images, since the Apparitions are the hardest bestiaries to finish. If you hunt only upstairs you'll finish Many Faces and Phantoms very fast, but Apparitions will be very far behind.
That being said, my suggestion would be the big room at the middle of the -2 floor, so you can lure from both sides to it.