If person who never ran duality farms it will they get any drop or only the ones they unlocked
#Duality Never Ran it
brittle wharf
cyan terrace
each encounter gives certain loot. the bonus chests give a random weapon/armor piece for whatever you already have unlocked
hard wren
If you are looking to farm for a specific weapon or armor piece, I suggest you grab a checkpoint, or save one through your runs
From what I remember for drops for each encounter are:
Sorrow Bearer
-Epicurean
-lingering dread
-helmet/Arms/legs
Vault
-Unforgiven
-Stormchaser
-arm/chest/class item
Caiatl
-fixed Odds
-New purpose
-Heartshadow (it's farmable, you just need to be lucky)