As the game currently stands there is no limit (that I can find) on the number of units you can combine once you have researched Parties, Squads, etc etc.

But if we mod in unique buildings with powerful units I would like to limit the maximum number of these units that can be built. As an example, if I have a building that allows me to build a troll, I would like to only ever be able to restrict these to unit builds rather than parties or company builds.

Having a MaxCompanySize variable would be ideal.

And conversely, having a MinCompanySize would also be great if you were wanting to build packs of dogs rather than individual dogs as an example.