First, the conditions of the tests:
- All tests were done in the same place with the same waypoint file and the same profile settings. The waypoint file was just a simple kill wp file in an area with very fast respawning mobs. Loot filtering was switched off and all items were collected. The tests went for 30m or until the bags were full. Start and end times were used to calculate averages. Some of the tests were done more than once.
- I don't know how to display Excel info here so I've attached the file.
- I’m no data analysis expert but I can draw some obvious conclusions from the data.
1. Being in a party with a level 11 or a level 73 character made no difference to the results. As long as you are in a party, you receive the benefit.
2. Having extra luck made no difference to the daily item drop rate but being in a party did. But it behaved strangely. It seems that as long as you have some luck, any amount, your daily drop rate doubled when in a party.
3. If you have no luck then being in a party had no effect. So the benefit of being in a party must be the effect it has on luck.
4. Being in a party seems to affect different things differently. With items, arrows and projectiles being in a party seems to multiply the luck by 10. Whereas with mana and hp pots the multiple seems about 5.
I don't think the data is enough to make any more conclusion but I thought the above was interesting enough to post this. Hopefully this will clear some misconceptions about drop rates.