I get statistically significant better results with 2x stacked nucs (deep + deep) or (deep+ medium) than with a single story. One or two brood comb and the rest open frame with wire. One can leave the bottom open, as the swarm will move up to the top and build down.
Try 2 up boxes, and you will catch more swarms. It more than makes up for the extra hardware consumed. One can screw a batten to the outside to solidly connect the stack together.
My sense is a stacked 2 x 5 deep nuc is near the perfect swarm trap. Dr. Seeley's research points to this volume, and the orientation -- tall, narrow, skinny -- seems to please the scouts.