This thread is supposed to be a collection of advice. Feel free to add additional ideas. Please refrain from posting silly, offtopic or dishonest advice.
- Do build heavy defenses as far back in the base as possible, because at some point of time the front will have moved there. And you want to be prepared.
- The less metal extractor spots you took, the more caretakers you need to compensate for missing eco with caretaker eco. (Caretakers produce 0.3 metal per second, other constructors produce up to 0.22 metal per second. With just 3 Caretakers you get an additional ~1m/s income that is not shared to other people!)
- Morph your commander, because it will get bigger and gain additional capabilities and weapons. Your commander will be tough enough to hold front on its own and scare enemies away.
- If you overflow metal, it will be shared to your useless teammates. Instead build metal storages to save it for hard times.
