Something weird is going on. Not sure if it is attempted bugfix or a complete redesign as over the past few days I have swapped around some gear pieces, but not enough to drop from 24% mastery as the tooltip is currently showing around 12%.
Technically 12% is what appears to be the actual increase for the first HOT ever since the patch (according to multiple reports here on the forum), but with this new reworked scaling and diminishing returns on any additional stacks of Harmony, it’s quite a nerf to the before-patch state when the tooltip was showing ~8% flat scaling for each additional.
It feels bad and mathematically it looks like a big nerf to overall bonus healing.
Wasn’t the whole point of the rework to frontload some of the healing bonus and have it stack less with subsequent HOTs, in order to help with spot-healing and reduce the need to juggle 10 different modifiers in order to top someone off quickly?
Previously it would look like 8+8+8+8=32% final bonus (I’m using mastery value from my gear as an example).
After rework it was supposed to look something like 24+6+4+1% and further diminishing.
In practice it is now adjusted to 12+less+less+by the time of 4th stack, no more bonus.
If I’m not wrong, resto has close to 9 or 10 different HOTs, which is a massive nerf once you reach 5th stack of Harmony. 1 lifebloom alone can count for 3 stacks; 2 rejuvs, 2 efflo, 2 different wild growths (one from treants), cultivation, tranquility and even cenarion ward.
so if the base increase in healing is say 12%
for proof that something is broken you can easily test it out yourself
lifebloom talented to count as 3 stacks = only 8% increase to solo lifebloom ticks (no other modifiers)
lifebloom x3 + x1 rejuv (so 4 stacks) = increase of ~18% whereas before the patch, using same value of mastery from gear, cumulative bonus healing would be around ~32%
if you mix lifebloom x3 + regrowth the numbers don’t add quite right either, however with these four modifiers, regrowth’s heal over time effect gets increased by ~34% which is much more than I am seeing with the instant portion of the heal