it simply does not matter one way or another, have at least rocks in the system and that alone will produce the same carry ability that rocks, sand, 5 pound of bioballs, eight marine pure bricks, and a remote dsb will carry.
the reasoning is you can't add enough bioload in the box to surpass what rocks alone will carry, so the extra filtration stuff doesn't matter though we always pack it in x10 out of safety/abundance.
these rules are used when we change reef tanks into bare bottom instantly, or we remove all the accessory filtration you're considering. There isn't any reef bioload that rocks alone can't carry, hard to believe I know but its true.
using the media during your cycle isn't going to stop up anything, or prevent distribution, no harm comes from adding it all in the loop or excluding it.