It doesn't seem to work as protoss, but for terran/zerg it's very simple.
Map is steppes of war, opponent is terran.
1. train a worker
2. at the 15 second mark attack-move to their mineral line(all workers, with waypoints to ensure you get their refinery)
3. do something else for 3-4 minutes
4. repeat
So nice to spend 20s(bit more with loading times... sorry can't edit title) setting up a win and then being able to do whatever between games. Unfortunately this only accounts for terran/zerg portion of the achievement, but it's better than nothing. Hope someone benefits from this.