Just my thinking but I would go down to the two boxes until the comb is drawn out on all but about one or two frames. My thinking is, there is less empty space for SHB, roaches, ants, moths, etc to be in. I like to keep the hive kind of crowded, seems to be good for house keeping, but when honey flow is on you need to keep a closer check on them to prevent swarming.
G3