We can also do the same with the hide materials. With dragon hide, change the bonus from a +3 AC bonus to a direct increase to the armor rating. The same goes for Salamander, Umber Hulk, and Wyvern hides with their AC bonus respectively . Here's some examples:
Why does Mithral have to be the best? Ironically, Dragon Hide should be the best because it has the highest DC for crafting at 30. I think Mithral's crafting DC is just around 15.Wyvern Full Plate* Change the armor's weight directly to save on enchantment slots.
Heavy
AC Bonus: 10
Maximum Dexterity Bonus: 1
Arcane Spell Failure: 35%
Armor Check Penalty: -6
+4 Saving Throws vs. Poison
20% Weight Reduction *
Dragon Half-Plate
Heavy
AC Bonus: 10
Maximum Dexterity Bonus: 2
Arcane Spell Failure: 30%
Armor Check Penalty: -5
20/- Fire DR
20% Weight Reduction *
Dark Steel Banded Mail
Medium
AC Bonus: 7
Maximum Dexterity Bonus: 4
Arcane Spell Failure: 25%
Armor Check Penalty: -4
5/- Acid DR
Adamantine Breastplate
Medium
AC Bonus: 7
Maximum Dexterity Bonus: 4
Arcane Spell Failure: 25%
Armor Check Penalty: -4
(3/- DR w/ 20% Weight Increase) *
Salamander (Hide) Armor
Medium
AC Bonus: 4
Maximum Dexterity Bonus: 6
Arcane Spell Failure: 20%
Armor Check Penalty: -3
10/- Fire DR
40% Weight Reduction *
Adamantine Chain Shirt
Light
AC Bonus: 6
Maximum Dexterity Bonus: 5
Arcane Spell Failure: 15%
Armor Check Penalty: -2
(3/- DR w/ 20% Weight Increase) *
Studded Salamander Armor
Light
AC Bonus: 3
Maximum Dexterity Bonus: 6
Arcane Spell Failure: 10%
Armor Check Penalty: -1
10/- Fire DR
40% Weight Reduction *
Heavy Umber Hulk Shield
AC Bonus: 4
Arcane Spell Failure: 15%
Armor Check Penalty: -2
Immunity: Mind Affecting Spells