Cutthroat

You're in a race against Orlan to acquire 6,000 minerals. He has a grave advantage over you with three bases compared to your one. You'll need to even the odds quickly by rushing his territory. Produce a handful of marines, medic, and vultures to lead an assault. Each base eliminated will deal a serious blow to Orlan's production. Once all three are taken out, he will only acquire around five minerals at a very low rate.

You should also take this time to take a 1,200 mineral blow and set up three command centers to start mining Orlan's remaining resources. The more SCVs you produce, the faster you'll gain more profit. There are also many parts around the planet that can be salvaged for extra minerals. Even with Orlan's three major outposts decimated, he still has one remaining strong hold and will send small bands to attack. The base is to strong to assault head on, so for now defend your command centers with vulture mines and a few marines.

When you finally reach 6,000 mineral, Mira will add her forces to your ranks. These new troops include huge waves of diamondbacks and goliaths. Rally all of your army together and attack Orlan's last base. With Mira on your side, there is little Orlan can do to stop you.