From the page: "Solution: Multi-pronged blue-flame hellion harass and drops. You want protoss to be running around everywhere and camping colossi at every mineral line. It takes about 2 colossi or 4 photon cannons per mineral line to effectively shutdown 4 hellion harass. If protoss has 3 bases, that's already 6 colossi invested into static defense. If instead Protoss decides to sink 550 minerals worth of photon cannons at each base, you've already done your damage. "