Backstabbing in the Feast?

Type of Internet Connection:
DSL

Date & Time:
10/03/2016 Once around 16.00CET and once around 24.00CET

Frequency:
Sometimes


World:
Cerberus (Instance The Feast 4 vs 4 premade; 8 vs 8)

Character Name:
Aelia Sokoto

Retainer Name:
None

NPC Name:
None

Monster Name:
None - was PvP

Class/Level:
Scholar 60/ Astrologian 60

Party or Solo:
Party according to instance 4 man and 8 man

Race:
Lalafell F

In-Game Time:
-

Area and Coordinates:
The Feast (4 on 4 – Light Party)
The Feast (8 on 8 – Matched Party)

Housing:
None

Steps:
- In the afternoon went DF Feast to wipe for the lols
- Few instances wiped some won
- In one instance ran into the Enemies on my Scholar to Miasma II them all
- A second after I get a kill but the only person that went down from my PoV was my coheal
- Was slightly irritated but guessed its just a graphics glitch where 2 kill messages overlapped
- Went on with everything normal

- In the evening queued with friends
- In one run my friend got killed next to me while I was stunned
- Kill message pops up as if I had killed him

I assume this is a sort of bug I found there. I actually don't mind getting kills as healer but don't wanna get called a backstabber :p

Here's my guess on this:

Normally (ie. in PvE), if an enemy dies to DoT damage it is recorded in the chat log as "X is defeated." instead of "Rentho'ra Niet defeats X." However, with the Feast having its announced kills, this won't do. It has to assign the kill to someone. That "someone" is most easily assigned by taking whoever did the last bit of damage. But for the sake of argument let's say I kill someone using only Bio and Bio II - attacks that do no damage initially, but inflict damage over time. Going based on "who did damage last" isn't enough, because they would not have taken direct damage from anyone. So it seems that the logical criteria is "who affected the target last".

If you (or your fairy - pets are combined with owner for the Feast) healed the target but they die to DoTs anyway - something that is quite easy if only your fairy is healing - then you were the last player to interact with the target before they died. So... you technically "killed" them, because you didn't heal them enough? :D

I observed this behaviour myself when our Bard had DoTs on a target but missed out on the kill because the healer healed them, only for them to die to the DoTs and be marked as killed by their own healer.

Since there are no skills akin to "sacrifice an ally's HP to do XYZ", I think the easy fix would be to change the criteria to "who, out of the enemy team, affected the target last". This should prevent the "backstabbing" issue and award kills correctly.