Quote Originally Posted by Shodokan View Post
If your toons have different variables for haste (it effects the use of the vial) then they will ultimately do it faster or slower and some will and will not get credit. So if you are using hpal + 4 dks... your hpal gets 9% haste on top of the DK haste buff so he will get it and the 4 dks wont. Had to turn it in on pally and then kill a second set of 10 for that or click the buff off before looting.

Same thing with the knife quest in deepholm for skinning basilisks.
Interesting - I have a paladin and 4xshaman (who all have different haste) and got credit every time, except when some hadn't been set to target the mob properly.

I just loot the thing, target, spam IWT a few times and then have everyone use the ability and it works fine.

Edit: gonna guess the difference is due to the large (9%) difference. My shaman probably all fall within some kind of latency window.