>>281743833
Although they will build multiple units, I think what's going to actually counter Demons is some rare material that the robots are going to mine that has magical properties. That will help limit how many robots they can build and what they can do. That being said, I expect there to be multiple of those special robots in the next chapter that start learning how to counter specific magic similar to the 2nd chapter. Jachi's type is hard to counter because it's pure force/physical which they can't really do much about, but the laser beam and what not they will have countermeasures for.