Took me way too long to realize that autocast was referring to literal mana values and not percentages
The game gets a lot easier once you fully embrace the Korean MMO style potion chugging.
The mage's freeze sounds powerful on paper, until you realize that this is actually an action game and you can just simply evade the boss to the point that they're dealing too insignificant amount of damage to really care about.
I killed the demo end boss while only have killed 21 cultists and ending at level 26 with hunter.