I got tired of building this by hand every time I have to take over a planet. So I made this.
All produce expect t2 prolifiration but also work fine with none or just T1. I recommend using it rather than not. Its buildable with practically all starter materials and requires just belts of ore inputs.
Currently these are its stats: Consumption: 450/m coal (1.5 t1 belts) 360/m copper ore (1.2 full belt) 130/m iron ore (less than a belt) 18MW of power consumption.
Production: 54/m rocket sets or around 1.4k rocket shots per minute. If you can't prolifirate anything, at least try to prolifirate rocket sets. Requirements: 17 proliferators, 17 assemblers, 16 funances, 13 power poles, 1 storage, 104 sorters and 500 belts. With 18 t2 belts for copper. Optionally 6 traffic monitors.