This "elemental" damage on weapon makes zero sense for WD. WD is the only class that does not use "weapon damage" in runes. All of our runes change all the weapon damage to the specific damage type.
I really think they messed up somehow and refuse to fix it. They said "Add 8% Poison damage" on Zuni Boots is "poorly" worded when in reality, that property should be "Increasing" poison damage on our Class Specific item. I mean what's the chance of our Class set boots adding "Poison" damage and our Class set Knife has "Poison" damage and yet the synergy is really not there?
All Elemental damage really does nothing except for Cold.
Manajuma having "Poison" instead of Black damage just makes no sense as we don't rely on its "Poison" damage. We have to choose Poison damage runes to trigger Bad Medicine.