“You will lose Drouk Hunter if you return to medcenter, remain out of combat for too long, or if you re-engage Dreadooth at full health.”
So don't go to a medcenter, don't leave combat for more than 1 minute/60 seconds and don't leave leave combat heal up to 100% and rejoin the fight (although I've never tested the last one).
Unfortunately, we didn't even get a chance to do any of these.
It was just: position the tank, position the rest of the OP (in a certain range from the tank an Dreadtooth), pull! Then some got the buff, some don't... a couple of seconds (haven't stoped the time... 3... maybe 5, maybe 7 seconds) later half of the OP goes "boom" with the "Dread"-debuff, some even standing right next to another player still having the buff.
We also skipped the couple of seconds we give our tank to build up aggro during later trys. Unfortunately to no avail.
Retaining Drouk Hunter isn't the issue, it's odd that out of 12 of you only 6 got the buff though.
That's what confuses me, too. Especially, since there was no "reason" for it. We stood witin arms reach of one another, opened fire/heal together... one get the buff, one the debuff.
Keep in mind you entering combat seems to have some effect getting the buff, so I'd advise healers to start healing and dps to start dpsing as soon as the tank pulls - try stacking right behind the tank or next to the offtank (you don't need an offtank for 1 stack but it helps).
Right behind the tank is something we'd try... we also stood only about 10 meters away on two or three trys (we also brought a second tank with us, just for backup).
Has anybody downed Dreadtooth within... say... the last two weeks and either encountered this issue, too? Or downed him within that timeframe without any buff/debuff-issues?
(Anyway, thanks for helping.