right now I'm building an automatic mob spawner that with drop 1,200 drops per hour! heres the spawner that i'm building - https://www.youtube.com/watch?v=37WuZBE6BPU (https://www.youtube.com/watch?v=37WuZBE6BPU)
guero already made a huge automatic mob spawner
Also, sorry to burst your bubble, but the plugin provider we have puts a cap on the amount of mob spawns. Basically, it won't be as efficient as you hope.