IIRC this was fixed pretty long time ago, my KO blow was always able to hit those 'stacked in 1 spot' mobs all together. Believe it was along side the fix where mobs less likely would stack up (cap taunt/aggro patch?)
Specialy ET was having hard time with that 'exploit', instant death if you would have had more then 10 being stacked up in a spot.
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I thought they fixed this in times of issue 4 or something..
It still was there about a month back...
Ok, so they were SUPPOSED to fix this a long time ago 
It's fixed alright, and has been for a while.
No Energy-Transfer-suicides for a long time now. 
[ QUOTE ]
It's fixed alright, and has been for a while.
No Energy-Transfer-suicides for a long time now.
[/ QUOTE ]
I managed to suicide myself with ET while soloing about a month ago, so it's not been fixed _that_ long ago 
Yeah I say the same. Not played tank in missions recently but about a month ago I was still able to do this. I reckon it was that bug fix that stopped single attack moves doing AoE damage.
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I was doing some hunts in Crey's Folly yesterday and noticed that the tanker enemy stacking exploit no longer works ( where you could hit multiple enemies with single target attacks if they were standing in exactly the same place ).
I suspect this was fixed when they introduced that tanker AoE bug on test.
@Unthing ... Mostly on Union.