Farm weapons

[SeasonedNoob]

Per the guide, certain weapons can only be found at 'various locations' from breakable items.

Noticed that certain breakable items consistently produce certain type of weapon(s) excusively. Eg. first breakable item in Gold Axe Ravine always drops Nepgear gear. Are certain weapons only obtainable at certain locations, and is there a list/guide if this is the case?

Also, is certain OBS level required for certain items to appear drop? Does OBS level affect the drop rate? Enquired regarding this previously when OBS was at 60+, and supposedly that was good enough to get all items. Got fed up as nothing outstanding was dropping, and did another true end run. Current OBS level is at 90+, and already receiving consistent drops of certain items (refer Gold Axe Ravine issue above). Maybe it's just...'luck'(?). What would be the max OBS level?

Currently still missing following weapons from the guide :

Piercing Edge
Flash Edge
Pandora Edge
Slicer Edge +8
Indigo Magic Cotton +2
Indigo Magic Cotton +4
Indigo Magic Cotton +6
Rainbow Magic Cotton
T Cartridge
N Cartridge +4
B Cartridge
Back Generator
Beam Generator +1
VSS Book Cover SP
Grey Sphere
Blue Sphere +4
Red Sphere
Green Sphere
Dream Blade +6
Blood Blade

[SeasonedNoob]

Found listing of item drop locations detailed in the guide map. Completely missed it skimming through. Managed to nab most of the items. Still missing :

Time Bangle
Piercing Edge (IF)

Supposed to be able to find Piercing Edge in Last Blocks (SS), but have only ever gotten accessories to drop, never weapons.

Time Bangle supposedly drops from DC era Virtua Forest, but have only ever gotten IF weapons there, and nothing else, despite the guide specifying otherwise.

As described above, despite the guide listing various types of drops from breakable objects in each dungeon, have observed that only one category of items drop. Eg. if the guide specifies a dungeon will drop nepgear weapons as well as IF weapons, then only nepgear weapons or IF weapons will drop EXCLUSIVELY. Will never be able to get the other set to drop.

Do any of the extra settings influence the items dropped in a dungeon? I have all options on with exception of 'Tough Enemies'. Or do the dungeons drop different items, depending on WHEN you tackle them? Seriously considering new game plus, just to try and farm the items earlier (immediately on dungeon unlock)..