Make two groups. One with all the units and one with the zerglings only. When the challenge begins, attack with group 1 (all the units). Right when you see that the computer is bringing all his units, run away with group 2 (zerglings). You’ll kill most of his units and it’s gonna be a lot […]
The trick is to ‘Shift + H’ when you split your zealots. If you just split them, after reaching the point where you sent them, they will start following the banelings and will take splash damage.
I like to send the marines to the bottom, so baneling splash damage won’t hit them so easily. I also think the positioning is better to deal with the zerglings. It’s still hard 🙂