Simple question: what do you think is the hardest to fight? There are a number of machines that can prove challenging when up against them, but in my opinion the Stormbird is the most troublesome. It's weakpoints are hard to hit as it flies around, and it doesn't have a heavy weapon to shoot off and use against it. It's attacks are also hard to dodge and do massive damage against you. So what do you guys think? What machines gave you a run for your money or really tested your skills?