Hey there,
So long story short i was looking how the parasite dot works on Amber-Shaper Un'sok
"[...] Healing received will cause the parasite to grow, further this increasing damages."
So i took my logs and extracted some data, namely healing received since dot application, tick damage and various buff.
A simple linear regression can lead you to the simple answer : (10 man)
ie: tick = base + healing * 0.125 | base = 30k (25k NM)
I checked on multiple logs, and it appears there is some cases where people take increased damages (usually by a flat amount (ca. 20k or 3k5))
I spent some time (well yeah it was pissing me off) to understand why without results 
Here’s a chart of damages taken by target: https://i.ibb.co/VcN1x9Qb/by-dst.png (cant add links for some weird reasons)
I used class color, so our rogue takes increased damages for no apparent reasons (the mage took less on one DoT because of an alter-time snapshoting the damage increase, but it also increased the overall duration 
)
If someone has an idea why …
And for many people having some weird understanding of the mechanic, data show that :
the damage increase is indexed on *ALL* healing (overheal included) received, from *ANY* source
Also shields (ie absorded damages) are not included in this (not sure about health increase as i did not have logs with a war-cry effective on a dot application to check)
EDIT :
So after carefull analysis of logs it appears that :
Damage increased is indexed on raw healing (overheal included) from all sources.
The dot ticks every 2s for 30s (so 15 ticks total) (in HM, prob same for NM).
If the dot ends before full duration the remaining damage increase will be carryed into the next dot (healing received between last tick and early removal), this behavior includes death between ticks.
Also the carry-on is (ofc) cumulative, ie :
you already carry +10k dmgs, get the debuff and then get healed for +5k bonus damages before 1st tick, you clear the debuff prematurely (with a cos/ib/gi/…) before 1st tick, then your next debuff will now carry +15k damages for full duration
This carry-on mechanic is still effective between pulls !!
This is clearly a bug :
- I dont think the carry-on mechanic is intended
- If it is intended, it is still carrying the damage between pulls (even multiple appart)
- This is a server side computation micmac problem
