Effective tactics will be listed here, as they become common place. Different terrain and unit constellations will require adjustments, particularly if there is no core, or the planet is covered by lava, but some tactics have generally been shown to be more effective than others.
Even so, these are not fixed rules (even if they sound like it). If the situation warrants it, unconventional approaches may give you an edge. When you are reading this, however, you are probably new to the game, and should start by following these tactics until you have a deeper understanding of why they work (most of the time).
This is when you lack pretty much everything, particularly . You're living off your reserves, have little knowledge of the surrounding natural resources, lack and , and see virtually nothing of the terrain. Many matches are decided during this stage.
Usually, when you get here, you have a decent tower network, vehicle plants, lots of mines, and start wondering what to build with that terraformer that just completed its jobs. Usually you have a good idea of where your enemies are, your defense/offense is somewhat balanced, and the battle fronts are semi-stable.