Anobix the Wise wrote:
I thought amount of armor had diminishing returns as well. Where if we had 100 armor it gives a bigger reduction then them adding 100 armor and so forth.
Armor has diminishing returns in damage reduction.
Armor is linear in the derived tanking theory
Effective Health or
Effective Time to Live.
While going from 1500 to 2000 armor rating is more damage reduction than going from 2000 to 2500, in both scenarios, there is a certain calculation that was made to show how they both extend the character's time to live when under attack by the same length of time.
Damage Reduction = Armor / (Armor + (467.5 * AttackerLevel - 22167.5)
If you're a mage with 1000 armor, your damage reduction will be:
Damage Reduction = 1000 / 11557.5 = .0865 =
8.65% If armor was linear and had no diminishing returns, then we could simply double the damage reduction if we had double the armor. If it were linear, it would be a 17.30% damage reduction at 2000 armor.
But, when we ask the formula:
Damage Reduction = 2000 / 12557.5 = .1593 =
15.93%, not 17.30%. So, going from 0 armor to 1000 armor added 8.65% damage reduction, but going from 1000 armor to 2000 armor added 7.28% damage reduction.
However, if you want info on Effective Health, I have no idea. I don't tank yet on any characters so I haven't learnt it yet. Try the warrior forums or WoWWiki or just PM RPZip or something.