The idea that you can raise more or less drones is a myth founded on marketing foundation. The bees will raise the same number no matter what you do. You can skew the genetics, however, by stealing drone comb from the hives whose genetics you want and putting it in the hives whose genetics you don't want. The presence of drone brood will suppress the production of drones in the ones you gave it to, while the absence of drones in the hives you want genetics from, will stimulate them to raise more.