Goliaths alone? I don't think so. Any player with good micro (and we're talking bots here) will keep dancing out the damaged mutas, since Goliaths can't follow to kill. You should at least throw a couple of Valks into the mix. A bot could also pull off the cloaked Wraith + medic combo, perhaps.

Scourge snipe valks since they cannot move between attacks #1 and 8.

Valks also cannot fire once there are too many sprites/actions going on. They may have been excluded because of that if you didnt see any.