Halo 4's ,4 Sandboxes.

Well Maybe it’s 3 but I’m going to assume 4.

1-Human Sandbox (Br, DMR, Warthog, Scorpion, Marines, Chief)

2-Covenant Sandbox (Carbine, Plasma Rifle, Banshee, Elite, Grunt)

3-Brute Sandbox [Well this may not exist, But I will count it] (Spiker, Brute Shot, Brute)

4-New Enemy (NOBODY KNOWS LOL)

So which one should have the most weapons, most vehicles, and how should they work with eachother?