Anyone know of unique settings for World of War-BO2 Zombies?

Does anyone have information on the campaign difficulties for World at War and black ops 1 and some other stuff

I don't care for exact figures, just does it work for coop/ public lobbies?

and what about dead ops arcade speed fix?

BO2 has backspeed fix in the ZWR rules, wondering what that's about?

What other things can help without sv_cheats for public lobbies? Like: fast ray, fov changes, fov min and max for scope changes, fog off in bo1, fps limits effecting jump height etc

Any stuff like that? Cheers