Only one assembler is required, if you load it with speed module 3's.
![Image](https://forums.factorio.com/images/ext/4ef724013963a514916b5be66cc2acaf.jpg)
With productivity module 3's in all intermediate products, I can feed it with 9 slow ore belts. It eats 200 MW of power. The pollution also tends to annoy the neighbors. But with 15 destroyer capsules per minute, soon you will have no neighbors.
Click the thumbnail to see the support buildings.
![Image](https://forums.factorio.com/images/ext/4551371c1ba27dff0474de82a899cbc2.jpg)