Icy_Nelyan wrote: »Nirnhoned increase the Power of the weapon Is placed on, increasing the Power of your weapon increase both physical and Spell damage, Your Spell damage or weapon damage then increase light and heavy attacks, skills from every skill line, obviously if You are using magicka based skill, you use Spell damage over weapon damage and viceversa with stamina based skills.
As a plus your light attacks and heavy attacks scales with whichever Is higher between weapon damage or Spell damage, regardless of the type of weapon (in example, I'm a magicka DK using a Sword and mace as my main Hand setup and their light Attack damage Scales with sell damage since Is higher then weapon damage on my character).
The only things nirnhoned doesn't increase are Shield skills and bash damage (not really sure about bash damage, never tested actually), because they do not rely on weapon or Spell damage.
Edit: yes the trait applies to claws since You still have your weapon equipped althoug You are not visually using It and since the trait increase your equipped weapon Power which increase both weapon and Spell damage, your WW skills Will benefit from the trait.
phaneub17_ESO wrote: »BTW Heartland Conqueror + Nirnhoned = 30% increased weapon's damage.