IIRC, we didn't really consider culture as an option, but I missed this conclusion:
In the best conditions, even under HoF spam starts, traditional culture victory is not that fast, especially without the philosophical trait, not to mention the FR requirement Of course... if I had followed my own advice and played all three victory conditions out to completion with a test game as I suggested, I would have realized this. (Yep, those galldarn test games are too much of a crutch!)
It is not easy to see how a Culture victory would work. The Swinger's Pad could use culture through espionage, but that means some other culture must be there. Not sure if a minor civ makes that possible. Note that the "two cities can't use espionage" criterion is just nerfing the exploit Ducks used in SGOTM16 to get fast legendary cities; you can just play a normal low-espionage culture game and fulfill the constraint so long as you do not culture-bomb the Swinger's Pad. However, a "normal" fast culture game (stop tech at about Lib) will likely not have the tech to get to the lair.
In the best conditions, even under HoF spam starts, traditional culture victory is not that fast, especially without the philosophical trait, not to mention the FR requirement Of course... if I had followed my own advice and played all three victory conditions out to completion with a test game as I suggested, I would have realized this. (Yep, those galldarn test games are too much of a crutch!)