Rushing
From Spring
A succesful rush has to be planned from the fist second of the game. You should have more than one unit moving to attack before the end of the first minute. If you choose slightly stronger of faster units, an attack that starts before two minutes might be successful.
Watch your units and watch your economy. Attack from multiple directions to divide you enemy's defensive strength. Focus on metal extractors, wind if you see it, and power. Keep solar collectors closed to starve your enemy of energy.
And when your first ends, have another on the way.