dr larry Connor did a lot of work in this area in his new book bee sex essentials he has two chapters on drones and talks about rearing drones for breeding. the technique which i have not tried is to wire cage a queen into a frame and the workers will spoil the drones keeping them well fed etc. Dr Connor ran an insemination program for years.
drone flooding is tricky as it seems you need a few yards , and the mating yard is best supported by a few of your yards nearby to keep up your genetics.
genetics for the drone, drone frames, 14 day cycle, requires a bit of forethought and some random factors in alignment.
the dca should be about 50 percent your stock as that is prob the most you can hope for unless you are in a really secluded area or island like the buckfast folks in ontario.
to do this you would have your mating yard surrounded by your production yards. Eventually i will do the reearch to figure out the magnetic field component for the dcas and be able to do scans for this. placing your drones near the dca would save a lot of time and insure proper flooding.
tbh are not better or worse than any other, my preference is langs with drone brood which is easily harvested and again a trapped queen will make the nurse bees really feed the boys. points on the compas absolutely in a radius, look into the dca research done with the weather ballons and see what they came up with. Some folks have had good luck finding these areas on their own like old timer bee hunters (liners).
having thought on this myself yet being a small hobbyist, i though to flood the local area club with my stock and start that way as i built up to more controlled scenario.