I've been using the all factories approach for a long while now, believing (rightly) that it gives one a distinct advantage. Besides this I've been playing Gal Civ for at least a year.
Nontheless I still struggle breaching the "Tough" difficulty level. Having considered every possible approach, optimising my strategy, and being a relatively experienced gamer, I'm currently wondering exactly what the ingredient is that I'm missing in order to go for year zero victories on Suidical.
Any insightful opinion would be welcome.
Others... less so.