“If found on a weapon, the Flat Damage bonus applies only to that weapon.”
Now, this can be taken at least 2 ways.
A.) It could mean that only attacks directly from the weapon get it, and WD% procs don’t inherit it.
B.) It could be meant for dual-wielding to say it only applies to this weapon and not the second weapon equipped.
I’m most interested because of the Devotion Skill procs that include WD%. All the flat bonuses seem to be inherited onto these, but maybe not the weapon one based on which way that quoted phrase is interpreted.
Oh sorry. My bad. Not fully awake when I read your post.
It seems B is correct since the flat damage bonus is part of the weapon’s properties. Same goes to other modifiers like lifesteal, procs go off, lifestolen.