HEART OF THE DRAGON is such a cool fusion :D
So you touched on 1 thing that Im not too happy with, and thats everyone always ends up with Min Mana eventually. So theyre super important early than useless later. I'd rather spell spamming to be something you have to intentionally focus on, like with equipment (which would need more options for -mana cost than currently available). Also items going off screen is a big problem lol ive been pushing off addressing it cause it doesnt happen often, but dark harvest is an easy way to get to that point xD. Your Endless Potion idea is coming next patch too.