Yeah, the spawning system, from what I can tell, is pretty simple on some maps. I played a game on Avalanche, for example, where we were camping the enemy's base. There were players on my team inside the base and I was outside, underneath the man cannon, in a Scorpion tank. For ten minutes, I literally just looked left and waited for someone to spawn and then killed them, and then looked right and did the same thing. Apparently since my team was inside their base, they only had two spawn locations outside - one on the ridge leading up to the middle, and another on the opposite side against the cliff wall. That was it. I got an Invincible or whatever it is that you get after you get 25 kills without dying.