Drop ideas for GMOTA:

Monsters marked with ** indicate that they should always drop something from their pool

Zombie grunts and shotgun guy tier: milkjugs, minor crystals, helmets, steel armor (rarely), chests (rarely)
**Chaingunner tier: chests (semi rarely), drumsticks, bread, Food barrels (rarely)
imp tier: drumsticks, minor crystals
Pinky demon/specter tier: Big meat (semi rarely)
Hell knight tier: Big meat, chests (semi rarely), major crystals (rarely), food barrels (semi rarely)
**Baron of hell tier: big meat, chests, major crystals
Revenant tier: food barrels (semi rare), chests
lost soul tier: Milkjugs, helmets, drumsticks
cacodemon tier: bread, minor crystals
pain elemental tier: drumsticks, major crystals
**Archvile tier: Food barrel, big meat, chests
**Cyberdemon tier: Big chest (will add later, big chests will scatter out food barrels, both variants of chests, and other powerups)
**Boss tier: yashichis and big chests