I was planning on having a thing where if the first enemy you enter combat with has the Overmind it rerolls into another one to avoid it being too easy, but never got around to implementing it (and it's not a very foolproof method, so probably needed to think more anyway).
As the for empowered knight sprite readability, that's good feedback, thanks. I originally had knight icons without the fancy feathers and things; only added that later. Might need to go back to them if I actually update the game after the jam.
Thanks for playing and for the comprehensive feedback!