Don´t let them start beeping. Contact grenades and/or rocketlauncher are great against them. Needs some points in demolition experts tough. Other than that, AP 7.62 and headshots or a ton of legshots. Electric fences and barbed wire fence help alot by slowing them down. Dart traps are said to not trigger them also, never came around testing it so far tough.
We like your new zombies so much, we added a few of them to various groups - Added Wrestler to farm group, juggernauts have a rare chance of showing up in the wasteland (and on bloodmoon as you mentioned), and the scorchers and Cowhead to the burnt biome. The juggernauts have forced us to regroup and look at our base defenses a bit more intensely. We did dumb down the effects of the banshee just a bit as more than one at a time on horde night were nearly impossible for us to defeat, being blind as a bat. We have the mantis wandering the pine forests at night, and have the siren and undertaker wandering through the desert on occasion. The Geists and Archons on horde night are crazy fun. You did an amazing job using just server-side to make these zombies. You sir, are a skilled craftsman.Whomst have summoned me. Yeah, besides the Juggernaut (that only appears on his own quest and rarely on Bloodmoons) there are the "Bombers", zeds that explode on attack and low health. Aren't as destructive as the demolishers because they have no melee attack, but if they catch you unaware they are quite deadly. Also, his own attack triggers the explosion, so if they find a wall in their path they will go boom boom.