How does drop rate accessory work when in a party

Can we test this on a basic mob? Like say some guy with 4x and some guy with 1x twacking some random monster.

Hadriel

Could be different for normal monsters. Like, back when there was a drop penalty, if you were way above a monster's level, but someone else in range of the monster's level had dealt the most damage, the monster would still drop mesos even if you were the one to deal the last hit, which I would think implies that it's majority damage, but it could also just be an exception factored into the drop penalty (which I find unlikely, but, the last hit theory had to come from somewhere; there's had to have been some strong evidence for it, but it could just be that the person who did the most damage was likely to deal the last hit as well).