Already said it I my topic and countless other topics
Terror zone needs a player impact on how they are generated
There could be an hourly terror zone but full clearing or killing the boss of that terror zone moves the terror to a random other zone in the game you are, this repeatable eternam
Or on top of the hourly terror zone, there is a server counter where it counts the terror boss kills and when the counter reaches a certain number another zone is terrorized for the next hour. Giving a community driven impact on terror zones generation and giving multiple terror zone at once