So I played a while more, and realized that I never got to see the strongest neutral monsters when I played the first time. This time, in the very deep underground, I met Paladin (200 hp), Dark Knight (150hp), and Cyclops (160 hp, knockback effect). Are these the highest tier enemies? Are there more (Devil, Titan, Treant)?
In addition to Cyclops knockback, I noticed that engaging ranged units in melee combat reduces there damage - just like in Heroes series. I suspect you implemented tons of mechanics that aren't obvious on first playthrough!
I tried using Bow, and it doesn't seem to shoot. Neither F nor Tab do anything - am I doing something wrong?
Do weapon rarities matter at all? My legendaries are often +5 stat, while my common/uncommon items have +20.