I see, Yes i guess we havce to wait to do fully custom bosses and enemies, I guess its a way of using the toolset and think creatively how you can connect and use the devices and things avaliable to you. Sounds like a fun challenge! 
I wonder if its still posible to add a new mesh or texture to the enemies like the fiend and add some flavout that way. ill keep digging into this
Thanks for the input! Much appriciated!