I've just finished a most enjoyable FS game (diff 8.3, random AI types, Hard golems). Through pure chance, one of the AIs was an Everything type. Through further pure chance, there were 3 (count 'em: three!) regenerator golems on the map, one right near the starting HW. And it's an FS game, where you take territory all over the place alleviating otherwise crippling energy issues.
I spent my initial knowledge on all the Leech starships I could carry, and went shopping. The Everything AI ensure that there were *lots* of ship types I didn't have a cap of yet, and the Regenerator golems ensured that I never lost a ship that I'd reclaimed(*). By the mid-game, excluding the Spire fleet, my main fleet had north of 6000 ships in it.
Now OK, even 6000 assorted mk I-IV ships can't cope with the larger Spire waves later on, but everything else was just toast. I love this game...
(*) Multiple Regen golems and a strong economy are way OP with a touch of micro. As soon as a golem drops to 50% health, power it down and assign 60 engineer IIIs to healing it. 5s later it's back up at full health, so power the next most damaged golem down. Rinse and repeat. You chew through the resources, but it's like quadrupling the effective hp of your fleet.