FIRS industries indeed have a low starting output, but they can increase to huge productions quite fast if you suply them in the right way. It takes some practice, but it is certainly reachable. (first tip, don't even try to start with farms
)
That said, I do agree that Firs is more fun when you get more time to develop industries. My suggestion would be (if k9 catches on) switch s5 to 5bil and make Firs goal 15bil.
What would you guys think about something like that?