The weapons/armor areas in the wiki really need a spot for where they can drop and possibly drop rates.
From what I understood regarding that matter, the weapons and armors drop in the dungeons corresponding to their level : lvl 20 weapons and level 21 gloves in Drasilmarsh, level 25 suits and level 27 bangles in Bitterstone Core etc.
Concerning the drop rates well ...
From what I experienced, the loot tables from bosses in SINGLE player dungeons have at least 4 categories :
- a lot of hypovials
- some non-hypovials white items (passcards, cards, pet energy drink etc)
- some non-hypovials white items and 1 or 2 blue items
In PARTY dungeons, loots are way more abundants, so go for party whenever possible.
Note : for the blue items, I am pretty sure (but it is still a guess) that no difference is made between equipment parts and others, i.e. you could loot only rare suits as all your blue drops in Bitterstone Core, or only Aces of Club as your blue drops in Drasilmarsh.
Please remember I have no 100% certainty of what I said above