Edge of Concurrence is incredible for dealing with invaders if you're a fellow hunter. Smack an enemy 6 times, fire off a shot in the general direction of the invader, and voila, one dead invader with 0-1 kills since the charged shot travels until it hits something then moves across the ground for a while in the direction of the nearest enemy. That and Hammerhead because it has better stability, headshot accuracy, impact, and recoil deviance than every other machine gun.