Not enough to be able to click up faster than 2:05, unless you want to have TC idle, but will give it a go, and see how much we can push it with the timings. Also keep in mind you want enough citizens to be able to keep citizen + army production in classical.
it works for me around 1000 Elo, but pro players use it better than me. I would recommend checking out @HUSKSUPPE 's video on it. At low elo its just the stress of being attacked in multiple places that wins me the game, there are a lot more intricacies at higher elo. ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-JIc4OWcjP0c.html
