I did the calcuation before and after. So did someone else. We factor in the 25% damage reduce. If you use prismatic armor in patch 1.04 and don't in 1.05 facotr in the 25% damage reduce you'll be taking 37% more damage. Everyone still going to use the skill. I don't see how that help build diversity. It make it "a bit" less appealing but most likely everyone still using it.

Dude, I just did the calculations... You are not taking more incoming damage. You did your math incorrectly.

Let's say for instance I have 3000 Armor and 300 Resistance unbuffed.

With the old Prismatic Armor I would have 4950 Armor and 420 Resistance.

With the NEW Prismatic Armor I would have 4050 Armor and 375 Resistance.

- Old Mitigation -

Armor DR = 4950 / [4950+(50*63)] = 61%

Resist DR = 420 / [420+(5*63)] = 57%

Total = 1 - [(1-.61)*(1-.57)] = 83.23%

Old Inc Damage = 70,000

Mitigated Damage = 11739 Incoming Damage

- New Mitigation -

Armor DR = 4050 / [4050+(50*63)] =56%

Resist DR = 375 / [375+(5*63)] = 54%

Total = 1 - [(1-.56)*(1-.54)] = 79.76%

Old Inc Damage = 52,500

Mitigated Damage = 10626 Incoming Damage

Now, last time I checked... 10626 is LESS than 11739.

In other words, you guys need to revisit your math.

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**@Drothvader | US Diablo III MVP**

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