speed2 wrote:
its 16 players max, + civs and stuff

But anyway putting the untis into civilian army would not help much even if it did something, since that army would still be neutral. You want to use some different army, so like ARMY_9 for 8 player map.

Another thing is how the AI works. It doesn't like prebuild bases and it won't probably work well with anything it didnt build itself.

Best solution would be to script it like the missions are.
https://wiki.faforever.com/index.php?title=Mission_Scripting
With that you can script some basic attacks or anything, the BaseManager can maintain any base you create in the editor.

I've never tried this outside of campaign missions, so I dont know what exactly it will require to get it working in the skirmish, but you can play with that and see what you can do.

speed2 wrote:
Its not impossible, just not so easy, also the that army will be neutral to all players. So depends what you want to achieve with this.