Healing Amplification

Healing amplification from items increases the hit points cured by healing spells.

Similar to dodge bonuses, these effects only stack if they are not identical.

For example;

10% Healing Amplification on item #1 + 20% Healing Amplification on item #2 + 30% Healing Amplification on item #3 -- effects stack

but,

10% Healing Amplification on item #1 + 10% Healing Amplification on item #2 -- still 10% Healing Amplification (effects don't stack)

However, healing amplification is calculated this way;

10% + 20% does not equal 30%

You actually multiply, not add.

10% = 1.1 20% = 1.2

Therefor, a dwarf, with a 10% and a 20% healing amp item would calculate their healing amp with the following formula;

1 x 1.1 x 1.2 = 1.32

This works in favor for most characters, where their total healing amp actually exceeds the added sum. The exception is Warforged, where their base number is < 1... therefore reducing the product of all their healing amp.

Sources of Healing Amplification

 * 10%
 * Dragontouched Armor, Eldritch
 * Greensteel Weapon - Tier 1


 * 20%
 * Dragontouched Armor, Tempest
 * Greensteel Weapon - Tier 2
 * Levik's Bracers (From Hound of Xoriat raid)
 * Can be crafted on Tower of Despair Rings (Incredible Potential)
 * Epic Bejeweled Letter Opener


 * 30%
 * Greensteel Weapon - Tier 3
 * Epic Gloves of the Claw

Additional Sources of Healing Amp

 * Human Enhancements
 * Monk Enhancements
 * Paladin Passive Past Life Feat
 * Finger Necklace - +10% (Type: fleshmaker, so stacks with everything)
 * Docent of Blood - +10% for WF (Mechanics on this docent are unique and stack differently)
 * Jidz-Tet'ka - +25% (Type: insight) for Monks in fire stance.
 * Warforged Healer's Friend Enhancements (Note that Warforged Healer's Friend enhancements do not behave like standard Healing Amplification. See below for more details.)

Warforged and Healing Amplification
The method used to calculate the amount of healing received by a Warforged is a little strange.

(Base Heal Amount * ( 1 + 2 * Warforged Healers Friend Amount ) / 2 ) * Healing Amp 1 * Healing Amp 2 * (and so on)

So, for a base heal of 100hp with 25% WF Healers Friend and 10, 20 and 30% healing amplification a WF would receive: (100*(1+2*0.25)/2)*1.1*1.2*1.3 = 128.7 = 128hp (seems to always round down)

Note that this means the WF Healers Friend line is actually significantly more powerful then standard healing amplification (like the Monk enhancements). On a 100hp heal, a 20% WF Healers Friend will give 70hp whereas a 20% Monk Healing Amplification will only give 60hp.