Death Strike heal, how does it work? (inconsistency with logs)

[maky13]

I`ve been looking over some logs to check DS heals and I notice that the 20% of damage taken in last 5 seconds formula didn`t give me entirely accurate results. I`m quite sure I failed to take something into account, but this is why I`m posting this thread.

Now, the issue at hand is pretty easy to investigate: pick a random log with a blood DK, and then look for all damaging events and death strike heals. Normally, each non-minimal death strike heal should be around 20% of damage sustained in previous ~5 seconds (to accomodate for latency), modified by SoB stacks and Vampiric Blood (is there any other modifier that I`ve missed?). However, when looking at this, I`ve observed rather big differences between the estimated amount and the real amount.

Quick 3 examples below (lost the actual log link, only kept the excel file):

#1:
Damage taken = 865k
SoB stacks = 2
Vamp Blood = on
Heal = 368k
My heal estimate was 302k, so around 20% difference.

#2:
Damage taken = 630k
SoB stacks = 3
Vamp Blood = off
Heal = 250k
My heal estimate was 201k, so around 25% difference.

#3:
Damage taken = 1.06M
SoB stacks = 1
Vamp Blood = on
Heal = 521k
My heal estimate was 319k, so around 60% difference.


Again, I believe that I am either missing something or I don`t understand exactly how the mechanic works. Has anyone else noticed this, or can anyone explain what I`m doing wrong?

[Chuckadoodle]

Minimum of 7% of your maximum health?

[maky13]

That minimum is more in the 50-70k heal range. I don`t have 4M hp yet

[Rekiara]

Hmm.

#3 looks like Guardian Spirit was involved (Holy Priest spell, increases all healing on the target by 60% for 10 seconds). If you don't run with a holy priest, then I dunno what else it could be.

#1 could maybe be explained by the Vamp Blood glyph (40% healing boost vs 25% unglyphed)?

Not a clue on #2

Also, which fight are these from? There are, after all, certain boss mechanics that can increase healing done / taken too.

[Wolfbear]

Does it add the 7% minimum health heal anyways?
#3 Really does look like guardian spirit.

[maky13]

Didn`t have GS or Vamp Blood glyph, fight was Tortos. However, I forgot about 4-set T14, so 10% from there.

[Keiyra]

Are those numbers/info accurate?
Because between attempts 1, 2 and 3 you can't get it workout consistently with the information given.
My estimate heals are under by 10-13%, and way under for #3

An actual combat log/parse or more detailed data might help.