While Righteous Fury is active, all damage taken is reduced by X% and increases the amount of threat generated by your Righteous Fury spell by X%.
Increases the amount of threat generated by your Righteous Fury spell as well as decreasing all damage taken by 2% per rank. A must have for Paladin tanking.
Improved Righteous Fury is a talent in the Protection tree, you will need to spend 13 points in Protection to max it.
The damage reduction is only in effect as long as Righteous Fury is active on the Paladin.
The talent's modifier is multiplied, making the result a 90% threat increase from RF: 1.5 x 60% = 90%
After taking the Improved Righteous Fury talent and maxing the effect, the spell icon in your spellbook or on your hotbar indicates that the threat increase caps at 90%. It will not state the increased damage reduction by this talent.