Name of plugin you want:
Spawner Delay Plus
Spigot Link: https://www.spigotmc.org/resources/spawner-delay-plus-run-a-factions-server-with-spawners-then-you-need-this.16155/
Price: 4.99 GBP
Why you want it: I think it can really help me with my factions server with the spawning on spawners...