If you opened gateway/robo. You need to take an early third (9min) and prepare for mutas at every base with cannons before the Mutas arrive.
If you opened stargate, just pump phoenixes, take a later third (12-13min).
How many cannons should you make in each expansion? Do you make 2 cannons for each 4 mutas or something? And is it better to just leave a couple of stalkers and/or Archons in each expansion to deny muta harass?
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