Conquerors 1.5.1
In later builds, building a farm or a lumber mill took 10-15 seconds to "activate." In , resource generation is instantaneous upon placement. This allows for "blitz" strategies—sending your first three peasants to build a forward barracks within 20 seconds of the match start.
If you want , 1.5.1 is still excellent. If you want modern features, play DE. conquerors 1.5.1