Optimal Loot
Another feature of Loot 2.0 that has sparked lots of discussion and speculation is Optimal Loot.
It is important to note that Optimal Loot only affects loot composition (what you loot), not the loot value (how much you loot). There is no Optimal Loot penalty for hunting creatures that are well below your avatar’s level; in fact most such kills will meet the requirements for Optimal Loot composition.
To best achieve Optimal Loot:
Be sure to have the Hit Ability and Damage profession requirements maxed (10.0/10.0) on the weapon your avatar is using.
Avoid over-amping (using a weapon amplifier that adds more than 50% of the maximum damage of the weapon to which it is equipped).
Minimize healing costs and the need to interrupt damage dealing to heal.
In general, the lower the cost to kill a creature, the higher the proportion of loot composition will be Optimal Loot. There is no inherent “kill timer” for each creature; Optimal Loot is calculated based on costs, not on time.
https://www.entropiauniverse.com/bu.../Developer-Notes--12---Loot-2.0-Follow-Up.xml