One old empty brood frame of known healthy provenance is a good swarm lure and one I have used successfully over and over again. There are people who will tell you it's dangerous insofar as an unhealthy swarm will use any contaminated honey to draw new wax rather than transferring it to new brood.
I put in only one old brood frame and some empty frames with starter strips. If you read Thomas Seeley's Honeybee Democracy he goes into great detail about how scout bees choose a new home. The cavity is measured and scouts actually fly across it, so filling it full of foundation might convince them it is actually smaller than it really is