We want to avoid building a 3rd base before even finishing our 2nd base while doing a fast expand build.
We should consider the number of workers we have and the number of available mineral fields in our bases (if we don't have at least 1 worker per patch, we might not want to build a 3rd yet, for example).
The same logic could likely be applied for the 4th base, beyond that we should let the economy handle it (since we have a hard worker cap).
We want to avoid building a 3rd base before even finishing our 2nd base while doing a fast expand build.
We should consider the number of workers we have and the number of available mineral fields in our bases (if we don't have at least 1 worker per patch, we might not want to build a 3rd yet, for example). The same logic could likely be applied for the 4th base, beyond that we should let the economy handle it (since we have a hard worker cap).