The damage variance between a Critical Hit and a Non-Critical hit.

[Voltyblast]

Direct Hit probably shouldn't even be a stat honestly.

Yeah I never understood this either. It was meant to replace Accuracy but I also never understood why adding additional crit damage with more crit damage. It worked fine before then so why another extra crit?

It's weird because other games make it very easy and simple: crit increases crit percentage and usually that's it since a crit damage is usually a static multiplication (double damage or 2.5 damage, depends on the game itself), spell/skill speed increases speed (why isn't it just one stat called haste already...), and determination is a net damage and healing increase of a certain % (if you played wow, it's the Versatility stat)

And I also don't get it why we tanks get Tenacity - which is essentially a worse determination stat - and hardly any other proper avoidance stats like Parry or Dodge (we had parry but it was poorly implemented)
Piety is completely useless mana recovery stat considering how healing works in the game and with so many mana recovery skills already in the game. I'm not even a healer main and I rarely go oom!

It's no wonder that most classes still only require Crit and Det to this day!