Interesting, I have been keeping the flow hive on the AS hives while I wait to recombine them. They are putting on weight like crazy, 15 pounds in 2 days. My theory was that since the AS is 100% of the flying bees and no nurse bees, other than the one or 2 frames of eggs you give them, they do not have young bees to feed. So this one hive I gave one frame of eggs and 7 new foundation frames no comb, and the flow hive on top with no QX since there is not queen. Very productive.
I have another hive also in the middle of a snelgrove split doing the same thing but I don’t have scales on that one.
So my point is that is seems as though you do not lose harvesting time by doing a snelgrove if you keep the supers on the AS hive. (Artificial swarm)