Copied from another thread because I was asked and it might be useful:
To add to this thread in particular; since it’s mid game:
- Putting up an early planetary does slow down the Terran player’s economy a bit; so there is a trade-off that you might be able to exploit in some cases by attacking elsewhere or expanding more aggressively. This isn’t as much of a factor on the 4th and later expansions though.
- If you don’t have the forces to kill the planetary quickly, it might be better it to kill workers and move on to the other expansions or the opponent’s army, if you can do that.
It would take a lot of Zealots to take that down, so you might be better off targeting the SCVs and ordering the Zealots to move on to another target.
One option you could try is to include a few Stalkers or Adepts in that attack and order them to Blink/Shade behind the mineral line out of the PF’s range to deny mining (Adepts may be preferable based on the cost, shade, and their worker damage). That alone leaves you several options with the Zealots:
- Try to kill the workers at the expansion or as they flee.
- Order the Zealots to the next expansion or into the Terran player’s production to cause problems elsewhere.
- Use the Zealots to intercept and annoy whatever clean-up crew the Terran player tries to respond with.