@Casta
I did say that the premise Tenebrium weapons are your ultimate weapons is debatable. Of course it's not necessary. I can play the game with white weapons and no armor if I wanted to. For the people who like to maximize their numbers though, Tenebrium weapons are the best choice.

Say you sharpened your cleaver and added an elemental essence, the most you can improve a regular weapon. It's at 100-200 slashing, 40-80 Fire. With 1-handed mastery at 5, your potential is 210 - 420, avg 315.

Now you add Tenebrium. This means the weapon is at 100-200 slashing, 40-80 fire, 40-80 Tenebrium. Assuming you maxed Tenebrium to 5 and got the quest which gives you +1 Tenebrium, your potential is now 288 - 576, avg 432.

With how weapon mastery works, I'm not sure how you can buff one class and nerd another. Like LordOfBones said, it's more the talents being unbalanced