Looking for an object that creates dummy actors under special rules: If the machine detects the enemy has more actors then you, it slowly creates dummies (lightly armed) until the numbers are even.

You're actually (mostly) in luck, Kyred and LowestFormOfWit have been working on a pretty crazy dummy factory module, which should be released soonish (delays at the production facility)

Adding your requested conditions to that factory should be fairly simple.
As a mediocre Lua scripter, I could probably do it.
I promise that I will forget your request by time they release it.