Responding to your earlier post with setup zones and VLs. I would have no complaints regarding either. One thing I noticed VLs looked like something more for an Attack scenario than a Probe. I don't think of probes as battles that would end with a breakthrough, and the 4000m looks a little long for the point allotments a probe provides. With that in mind, I did some force selection testing using the Attack level points, and I will say that the amount of blue forces is less than I would hope to have to defend this map. Of course, one never feels like they have enough points.
Having a third party set the game up for us sounds like a great idea! I don't think reinforcements plays into it though. In an Attack scenario, the blue side needs all its forces, and an attacker would usually not plan/launch an attack without immediate access to his whole force either.
On the other hand, if we were planning to play this in multiple phases, then the use of reinforcements might make sense. I say "might" because the initial phase would likely be a recon phase. Typically the attacker would recon either to look for a weak point (little or no contact) or to test the defense (some contact), while the defender would recon to determine where the attack is coming from. The point I’m trying to make here is that recon isn’t very valuable when the forces you are trying to collect intel on are not on the map yet. Seems like we need to setup those reinforcements from the start, but not proactively control them until the recon phase ends.