I know that there are lockdown and blast network. But why don't they add war games.
Capture the flag.
Like lockdown,except no powers and only 1 flag each. If you are defeated, you will be a prisoner. You have to fight your way through.
Deathball.
For gunslingers. You basically play paintball, but with your guns instead.
Spiral fortress.
Basically 4 teamed capture the flag.
What do you think?
I think you play too much Halo 4 and don't actually know what war games are.
As for your actuall "suggestions", I could throw a phone book into a blender and get more detail than you've provided. The phone sludge would also be more balanced.
There's a search function, and there's also Google. Use your resources.