There are a few threads out there dealing with healing amplification and the formulas behind them, but nothing I found went into enough details to explain some odd behavior I had noticed recently, so here's what I have collected. Feel free to add to this if you have a Human, Warforged or Monk with all of the necessary items available to do testing with.
- Healing Amplification items of the same bonus DO NOT stack. For example, Levik's Bracers and a Tempest 20% Healing Amplification on Dragontouched Armor does not stack with each other.
- When using a Finger Necklace, the order that you equip the items in DOES matter. Any amplification items put on AFTER the Finger Necklace also boost the 10% from the Finger Necklace.
- Healing Amplification % items multiply together to determine how much you are healed, and thus order DOES NOT matter amonst these items.
The first (and most complete) round of testing was done via the Meridia healer on a Dwarf. The results in ascending order of amount healed are:
Explanation:Code:Naked = 110 10% = 121 20% = 132 30% = 143 10% + 20% = 145 10% + 30% = 157 20% + 30% = 171 10% + 20% + 30% = 188 10% + 20% + 30% + Finger Necklace = 199 20% + 30% + Finger Necklace + 10% = 200 10% + 30% + Finger Necklace + 20% = 201 10% + 20% + Finger Necklace + 30% = 203 30% + Finger Necklace + 10% + 20% = 203 20% + Finger Necklace + 10% + 30% = 204 10% + Finger Necklace + 20% + 30% = 205 Finger Necklace + 10% + 20% + 30% = 207
The Finger Necklace is adding on 10% of the initial spell when it is the last item equipped, or in this case 11. When it is equipped BEFORE putting on Healing Amplification items, the amount healed increases because the Healing Amplification boosts the bonus from the Finger Necklace. For example, wearing the Finger Necklace first and then putting on all 3 items generated a Heal of 110*1.1*1.2*1.3 + 11*1.1*1.2*1.3.
Partial testing was done with a Human (using Human Improved Recovery 2):
I also did some brief testing by resetting my enhancements, and testing the values as I added Human Improved Recovery back in. This DID add to the amount healed by the Finger Necklace, but it would be an incredible pain to try and reset your enhancements like this just to get a small benefit.Code:Human = 132 Human + Finger Necklace = 143 Human + 20% = 158 Human + 20% + Finger Necklace = 169 Human + Finger Necklace + 20% = 171
I discussed some of this while performing these tests with another player on Sarlona who uses these a lot, and it appears that during initial testing (months ago when the Shroud was new) the order did not matter. However, it's fairly clear that it does now, and he had noticed some inconsistencies too. This all got started because I noticed that on occasion my tavern food was healing me for different amounts even though I was wearing the exact same equipment.