So I have been making more tools for mission makers an this is in no way complete. I have created some prefab object compositions, 4 of them using Iron Front Weapons (MG42, Maxim, Zis3 and Pak40) I plan on making an AA encampment and some sort of Supply Depot. Let me know if you can think of any other compositions you'd find useful. The ZIP just before the first screen is the small files you'll need.
More information found here: (I am not the author of the Createcomposition.sqf, just the compositions)
I have made a short vid on creating and using compositions:

and vID WHERE i Show a mission made entirely with spawns and scripting :