According to the tooltips...
Mortal Strike does "weapon damage", plus a flat amount.
Backstab is the same. It deals 150% "weapon damage", plus a flat amount.
But then you have abilities like Aimed Shot that are different. They increase "ranged damage" by 600.
Abilities like Shred deal 225% "melee damage", plus a flat amount.
Heroic Strike increases "melee damage" by a flat amount.
So what is the difference between "damage" (either ranged or melee), and "weapon" damage?
I would imagine that something like Mortal Strike, based on it doing "weapon damage", would take your weapon, look at the damage range, pick a number within that damage range at random, add the flat damage bonus, then deal that as its damage. But that means that Mortal Strike is unaffected by attack power, and is ONLY affected by weapon damage and crit. So does that mean a Mortal Strike done by a player with no armor at all will deal the same damage as a Mortal Strike done by a player with bis gear? (aside from the crit chance)
And subsequently, abilities like a Druid's Shred would scale a lot better, as they would take your entire damage as a whole, and not just weapon damage.
Am I missing something here? Because when it says "weapon damage" to me that means it does damage based on your weapon alone. And when it says something like "melee damage" to me that sounds like it does damage based on not just weapon damage, but also your attack power.
Any help would be greatly appreciated, because that is how I have always imagined the difference to be for the last decade. But surely that would make attack power kinda pointless for most classes aside from auto attacks.
Thank you
