I have been wondering this for a while, but actually looked it up today.
Why do we have a grand total of 5 items that give a Natural Armor bonus to your AC when we have 3 items that add Dodge bonuses (Not including the ability to add dodge bonuses to shields and armor via crafting)? Why does it seem that Natural Armor is so much more valuable on an item than a Dodge bonus when a Dodge bonus actually stacks with another? Is it just me? The breakdown is:
Natural Armor
So, for Natural Armor bonuses, we have 2 rings, an amulet, and a weapon, none of which are better than a Barkskin potion that you can pick up from your local vendor. We also have a robe from the Abbot, which even changed again, people still rarely run in successfully. But, notice that none of these items actually drop from a quest that can be run repeatedly with a chance of getting it, and one of them was only available 2.5 years ago. Also notice that all of them bind. Let's compare that to Dodge bonus items.
- Amulet of Natural Armor: +1 Natural Armor, Neck slot, only available to pre-orders.
- Ring of Balance: +2 Natural Armor, Ring slot, must chose it from Invaders! (and can only chose one item)
- Hammer of Life: +2 Natural Armor, 2-Handed Weapon, Dropped from the Dragon raid
- Seal of the Earth: +3 Natural Armor, Ring slot, Dropped from the Demon Queen raid
- Shroud of the Abbot: +4 Natural Armor, Robe, Dropped from the Abbot raid
Dodge Bonus
So, two Dodge bonus items drop from normal quests, one can even be traded, and there is no item or clicky that duplicates the effect.
- Chaosgarde: +2 Dodge, Bracer slot, Can be farmed ad nauseam
- Chattering Ring: +3 Dodge, Ring slot, Dropped from the Titan raid
- Icy Raiment: +4 Dodge, Outfit, Also farmable, though it is bound on Acquire
So why is Natural Armor seemingly so much more of a pain to get?