Well, in fact, we can additionally also scold devs here too, whose idea was to remove mana. Mana is truly versatile resource that helps bring magical aspect to life within traditional RPG mechanics. We
discussed this
once in topics of resource organization and monipulation. That is, for
example, "hunters could use both focus and mana", also focus wasn't necessary to be displayed on main resource panel, but to be done according to principle of cumulative stack one.
Person is wrong here, of course, DK's implementation is(was) quite easy both mechanically and lore-wise without mana, however, initial configuration of their resources was much more interesting and more appropriate than bits they have left now.
ps. I thought they brought back mana for enhs, didn't they?..