I have played zombie since like 2006 and i have never seen server with such broken mechanic like Invisibility. Other servers had it but you could buy it for 2-3 times (same with madness or didn't even had it lol)
Imagine just playing the game as new player and just seeing half of the zombie invis. What's the point? Who are you going to shoot anyway, and even if you do he's just going to buy madness yeey so fun.
I think it's really time to nerf that and make it either a GLOBAL thing when certain number of people use it, it become unavailable or make it per player that you can buy at MOST 2 times (even 1 is enough). So you actually think when you are going to buy it and not spam it like ..
Now on to the Madness. Same thing with this, make it so people actually think when to use it or make cd longer after using.
If this happens then you should probably buff Zombie hps so they don't die just like that or nerf weapon dmg.
