I once heard that, within a party, the more damage you do, the greater of value the lot you obtain, providing that no one stays dead.
That was something that I never personally looked into. But is there some truth to this? If so, I am happy to hang back with my weaker weapons during party runs.
Sounds like another silly myth to me. If you wanna try you can do a few runs where only one party member fights at all while three others kick back and relax and see how the loot is distributed.