I look at drops and think that we get the characters tools of trade (arrows for archers, books from mages) or supplies (potions and scrolls and food) unless we damaged them in the fight, or the monster was running low on supplies, but they might also be carrying a treasure item or many treasure items, that they found and carry with them. Thus you'd have 2 different rolls for item drops. First roll for the mundane drop, and the second for the potentially good drop.
Note that treasure to a monster doesn't mean treasure to the player. They could be carrying around a skeleton as a treasure.
Note that treasure to a monster doesn't mean treasure to the player. They could be carrying around a skeleton as a treasure.
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