I can help with custom mobs and custom armor items lores and custom weapons with enchants, I can also add persistance so it doesn't despawn I can add potion effects, set the speed and health along with attack damage. Get back to me :P.
yeah that's easy stuff. You can even change the health and speed of the mobs without potion effects, as well as attack damage and whatnot.
btw, this would be a true custom mob:
(Yes, I made it by myself, and it is very laggy if you are using a slow computer)
The Meaning of Life, the Universe, and Everything.
That's what I meant. I meant I can create custom mobs with different armor, Items and armor with custom enchants and lores, change it so they don't despawn, I can change health, speed, attack damage. And I can also add potion effects to the mob.