Would you consider adding support for Optifine's random entities so that modpacks can add biome/height dependant alternative skins for certain mobs?
Moreover, and this may be an out of scope suggestion but, would you consider giving some of your mobs like the wroughnaught an NBT tag that can speed up their animations so that, for example, they could be spawned with a higher difficulty level where better reflexes and strategies are required to beat them?
I really love your mobs and you must be well aware that they are among the highest quality ones made for any Minecraft mod, I would love to have increased flexibility for them to be used in more than one way or as originally intended.
Thanks a lot for your great work, hope you keep it up! <3