PF's are the most versatile unit I find. They have amazing AI, great sight, a snare, and nades. Part of the reason to even go Breakthrough. I find I cannot get enough of them 3 or sometimes 4 is great.
JL are ok, and they get quite good with vet. Their small size and use specfically against infantry make them less versatile. I get 1 or 2 when I go Scavenge.
Falls are theoretically better than both of these units, but they are a small squad with tight clumping. Their extremely high price also makes them precious. With vet they are downright filthy. I still find myself rarely purchasing them.
