Again Prep-Time is a big problem here to scale, and that's not because of nukes or some other technology:
This thing costantly produces billions of spores, bacteria and viruses, and beleive it or not, that's actually a lowball, and not even a small one.
All of these organisms are spread inot the air, into the water, in the ground and underground. They can easly infect and duplicate, and since the smallest virus is actually comparable in size to a large mlecule, you nknow that's dangerous.
And they can duplicate without infecting, and each microorganism can indivifually reach the size of a full Composte Organism in around 2 minutes. So in 2 minutes you have at least billions of Composite Organisms to fight at once, and the fact that they all have Supergenius uintelligence, they can think and act likean hive mind, they have perfect cooperation, they can combuine into a larger organism and they can regenerate form the size of the smallest virus and for each an every piece left, a new Composite Organism posps out, and all of the clones can still duplicate, tdoesn't halp at all.
So, imagine if someone were to give this an hour of prep time. I don't even want to imagine what would happen.