Hey there 
i wish you could add these plugins please they are really cool!
Plugin name:Electric spawners
Plugin link:https://dev.bukkit.org/projects/electric-spawners
Description:This plugin allows you to turn the normal spawners into Electric ones from slimefun witch are alot better,they use some power but they don't need aplayer near by for them to spawn mobs and many other advantages
And this plugin please :3
Plugin name:Soul Shards
Plugin link:https://dev.bukkit.org/projects/soul-shards
Description:This plugin idea was taken from the mod "soul shards" it allows you to capture the soul of any mob and put it in aspawner and the better the soul is is the better the spawner is and there is 5 tiers How cool is that!?
Thank you so much
Note:Those plugins are addons to a plugin called Slimefun