Compatibility with Zombie Horde pluginSuggestion
When using Zombie Horde its not spawning any extra murderers with this plugin.  Not sure if it is possible or not since they both manipulate mummies/murderers but I would love to amp up my server with even more murderers!  Thank you.
@KingSizeKevin plagued murderers doesn't spawn any additional murderers, rather it applies clothing (with skins) to them when they do spawn. It may or may not work with other plugins that manipulate them, depending upon how they are manipulated.

I don't have access to Zombie Horde so, unfortunately, I can't test or tweak for compatibility

It does seem to have a negative effect with ZombieHorde.  It is an extremely popular plugin on PvE servers.  However I would love to spawn random murderers and zombies from the halloween event with new clothes but when I load this plugin in then all the ZombieHorde zombies get glitched like it is 2 zombies in one.  

https://imgur.com/a/d8cEDqH