Lotting rules for delve are very simple if they are not on your 3 main jobs they go as follows.

1 item seacom ~! Anything (including Plutons Airlixers and Crafting mats)

all gear from lesser NM's are free lot
ex. Manibohzo Brais from Matamata in Morimar

airlixer and +1's from Megaboss Free lot


DO NOT LOT UNLESS YOU ARE TOLD ITS FREE LOT