The big problem Shamu, and where I think in cases such as this, is there is no spectate of player mode, which means you cannot see what they are doing and how. You can be in their squad, and watch them sort of from a 3rd person view, but you only get 300 seconds, and from the view you get, it offers no real benefit other than knowing where they are from the spectator view and mini map.
to get to 70-0 I do find amazing myself, as the games can be very chaotic, random and enemies come form all directions, I am not saying it is impossible, but would be hard to justify getting to that score, even sniping.