Weapon Defense vs. Damage Taken

Well...
I saw the other thread where Ruust found the Heal formula using some data from people testing. He found the formula without an actual number as the base damage.

When finding damage equations, we are given the monster's def and your own attack. Similarly, we are given the monster's attack and our own def. So in a sense, it shouldn't be harder to find the actual formula. It's just that nobody has tried. Why not try then?

I'm curious why the horntail pendant and the zakum helmet combined can give you nearly a 400 damage reduction. (Which goes against the hypothesis that 2.5 def = 1 damage taken off.)

I've done some testing, and it seems that, if there is one set formula, then I obviously have a life that I'm not willing to waste cracking it. For example, at level 33, adding 10 def (Upgrading from a green Bamboo Hat to a Mythril Viking Helm) reduced over 30 damage on my page when I had a Dragon Robe, Venon Gloves, and Mythril Greaves. It wouldn't likely do as much of a difference if you slapped it on someone with work gloves, for instance.

I've come to realize one thing: The more defense you have total, the more each individual point is worth, essentially. Adding 10 defense to 0 def isn't a gamebreaker. Then again, neither is adding 10 def to 600 isn't going to be a gamebreaker either, but it will reduce more (on top of the initial 600 points) than adding the same amount to a lesser armored character.

All I can say for certain is one thing: There's a multiplier or an exponent somewhere in the formula; it is NOT a set damage reduction per point as people say. If you ask me, the whole "3 pts = 1 less dmg" theory was bullshit spouted by the dexless/ lukless community to try to convince others of their superiority.