Re: From my first three months in beekeeping.
Andhors, LJ is correct in that you have probably put the cart in front of the horse in this instance. But, experimentation is good and makes you a better beekeeper in the long run. Learning how to do a walk away split is a better first step towards increasing the size of your apiary. Grafting queens is resource intensive and one hive cannot support any type of successful grafting endeavor. You just do not have enough bees to make it work. Ideally, each queen cell would get its own nuc with at least two frames of bees so eight queen cells would need every bee you have. I would try to make two nucs with 4 cells each and see what happens. Where I am, the predation diminishes as it gets later in the season, but so do the number of available drones. You still have a good chance at getting at least one queen to return and that should be considered a success. Best of luck, and please keep in mind that any negative comments are constructive in nature and are intended to help you and other beeks in similar situations. It is better to attempt and fail (and post about it) than to not attempt at all.
Thankfully, the bees are smarter than I am. They are doing well, in spite of my efforts to help them.