CustomTierMobs

About:
Whenever a Zombie,Spider,Creeper,Skeleton,Enderman spawn on you server it will place the mob in a tier system.
Tier 0: is a normal mob like they are in vanilla.
Tier 1: Common mobs. This tier will make the mob have more health and i will drop more of the basic mob drop.
Tier 2: Rare mob. This tier will make the mob have more health then Commond mobs. And it will drop normal mob drops. And some of the Rare mobs will drop other items.
Rare Zombie will drop Iron Ingots.
Rare Skeleton will drop A Bow.
Rare Creeper will drop a TNT
Tier 3: LEGENDARY mobs. The mobs will have more health. When you kill a
LEGENDARY mob i have a chance of getting mob armor.
If you Kill a:
LEGENDARY Zombie, you can get Zombie Helmet
LEGENDARY Skeleton, you can get Skeleton Chestplate
LEGENDARY Creeper, you can get Creeper Leggings
LEGENDARY Spider, you can get Spider Boots
LEGENDARY Enderman, have a small chance of droping a Teleport Bow. That will teleport you where the arrow lands.

This is my first ever published plugin so it would help with feedback