[Nalzok]

Hello! I recently started playing the game, and I've noticed that the "master of" skills (hammer or sword, for example) improve the damage of their respective weapon.
Hammer mastery doesn't mention anything of it, but the axe and sword masteries mention affecting only 1-handed weapons of their type.

Also, I've noticed that the two-handed weapons skill only increases precision and attack speed.

So, is there a way to increase the damage of two-handed swords, for example?
Or does the skill apply to it and the description is right for the hammers?

And off topic, but I like to plan ahead.
That armor made of dragon scales that Victor is wearing in the concept art, is that light, medium, or heavy armor in-game?

I hope anyone can help me.
Thanks in advance.
Nalzok.