Don Durito
Hero
Armor as DR simply doesn't work without completely rewriting D&D.
It punishes multi-attacks more than it does escalating damage. Therefore, it screws Fighters and makes dual wielding even worse.
And, unless it scales with level, it risks becoming largely irrelevant to high level monster damage (unless they too gain their damage through multi-attacks in which case they become relatively weaker.)
You may get away with doing something like lowering the AC of full plate and giving it resistance to all damage instead (because half-damage scales).
Or giving all heavy armour damage resistance and then distinguishing between them by how much AC they give as well.
But resistance is largely the only additional tool you've got to work with. (If it was a computer game you could give 1/4 damage or 1/3 damage but nobody want's to be calculating that at the game table).
It punishes multi-attacks more than it does escalating damage. Therefore, it screws Fighters and makes dual wielding even worse.
And, unless it scales with level, it risks becoming largely irrelevant to high level monster damage (unless they too gain their damage through multi-attacks in which case they become relatively weaker.)
You may get away with doing something like lowering the AC of full plate and giving it resistance to all damage instead (because half-damage scales).
Or giving all heavy armour damage resistance and then distinguishing between them by how much AC they give as well.
But resistance is largely the only additional tool you've got to work with. (If it was a computer game you could give 1/4 damage or 1/3 damage but nobody want's to be calculating that at the game table).
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