Alright, did some testing. Hard/Hard/Year 0.
Started out with the Burlusts, docked witht he platform, then killed their Prime. Turmoil!
Gave SF tech to every race. Before I got to the last of them, the Burlust had already exterminated the Thoraxians. They then went on a world conquering spree, formed a fear empire, and exterminated every race except for the Acutians, who managed to stand their ground.
I teamed up with them, helping them research, build armadas, of course doing a whole lot of fighting - 300 Burlust prisoners are worth a lot as slaves. Eventually though, I caught a stray missile in a fight, was out of it for 20 months, and the Acutians went down. Game over, man.
Observations:
Federation points need some tweaking; when there's an all-conquering fear empire out there and I have good relations with all/most of the remaining races, they should be a lot quicker to form a federation. 700 FP missing? Yeah, teaming up against the Burlust isn't possible right now, sorry, please earn those points first.
Autoresolve is bollocks. The game should perhaps track player aptitude in some way, because I could handily wipe out groups of ten Burlust flagships (A cloaking device and a disruptor go a long way), but Autoresolve considers me incapable of destroying a single armada without having to retreat. Meaning I had to either stay in the fight personally, forever, or just give up. Meh.
That said, I really should have spent those 150000 credits on saboteurs rather than on scientists. I think.