Metal is your primary resource because it is the hardest to get. All metal spending requires an equal amount of energy spending. A fabricator that cost 100 metal will also cost 100 energy. This means that you always want at least as much energy as you have metal. Also, some units and buildings will consume excess energy to maintain cloak and restore a bubble shield.
After that it gets a little trickier. You can never have too much energy. That’s because excess energy is used to “Overdrive” your Metal Extractors (Mex). When energy accumulates past your storage limit, it is automatically applied to Overdriving your Mex which starts to give percentage gains on each Mex connected via your energy grid. That’s why you’ll see people building “power lines” between their metal spots. Excess energy becomes more metal, which lets you build more energy, which gives you more metal. There is a tooltip that will pop up when building an energy production building that will tell you the estimated time it will take to pay for itself in extra metal gained from overdrive.
That’s all a lot to take in and you can safely ignore it until you get your bearings.
Just follow some simple guidelines instead:
(in order of importance. if nothing else just follow rule #1)
- make more energy than metal
- excess energy is good
- Connect your Mex with power production buildings.
- F4 will toggle the display to show economic information and the power grid.
- Make your power grid change color from purple to green as the power grid touches your mex. This means your overdrive is good.
- Eventually connect more expensive power production buildings to your power grid to make even more metal.
It’s always cheaper to make more Mex than it is to overdrive fewer mex by making more energy. This is how to game balances map control with economic development. If 2 players have equal map control, the player who has a stronger overdrive economy has advantage. The risk/reward is that you have to spend more upfront on your economy instead of your army to get an advantage later. Also, your power grid becomes a point vulnerable to attack if your unable to maintain map control.
Note: Reading this back just now, and boy it must look overwhelming