There is no deep plan yet. I'll need someone with a deeper understanding of the game's code to help me do this part, or, at least, make it possible in the base game's code for mods to add battalions of this type, even if public mod ("Empires Ascendant") doesn't use the feature. 

How much variation reduction is necessary to support instancing?

@Thalatta The actor actually uses several variations, so that it can be all things at once.  

Seems pretty good to me! You seem to have placed the spear as it was placed, according to these coins:   I would just hang the sword higher up, and on the left side (as should be for right-handed people), to reproduce what's seen in the coins (maybe I'd also go for another kind of armour, but it seems @wowgetoffyourcellphone chose scale armour for some units, I wonder if for some reason):   I'm quite confused about the helmet. You used a Chalcidian, while I'm not sure if the coins show a Boeotian, which would be highly irregular since the equipment placed in a trophy should be that of the defeated army, but on the other hand this is a highly irregular monument since, unlike all previous trophies, it was made to last, so I wonder if a decision was taken of using Theban equipment instead (which would require another shield device). I couldn't find any commentary on this for now, so I cannot say for sure what's going on with this (it could just be a Chalcidian or Corinthian tipped upward, but doesn't seem so on the right coin).

Beautiful, bro! Always a pleasure when you're bringing us good work!