Augmenting Weapons
Augments in FFXI are placed into "slots" on items. In the case of augmenting weapons from Reisenjima with Pellucid Stones ( P), Fern Stones ( F), and Taupe Stones ( T), there are 5 slots that are used whose caps and probability of occurring varies between the different stones. Those slots are:
Slot 1: Job-trait or "special" stats, like Physical Damage Taken
Forced to occur via Fern Stones.
Cap varies from stat to stat, and are increased by 1 when using Fern Stones.
Higher values are less likely than lower values. With Fern Stones, the probability of a maximum potency augment is approximately 3%.
There are 8 different augments for each armor that depend on the path.
"Off-path" augments (10% rate) manifest in the form of Physical Damage Taken, Magic Damage Taken, and Damage Taken augments.
Slot 2: +1~10 Base stat (60% chance of slot)
Taupe Stones raise the cap to 15 and force this slot
Distribution is flat. You are just as likely to get the maximum value as the minimum value.
The 3 on-path base stats vary based on weapon, but off-path augments are possible with a low probability (10% rate).
Slot 3: +1~20 Accuracy (60% chance of slot)
Pellucid stones raise the cap to 25 and force the slot
Distribution appears flat.
There are no off-path augments for this slot.
Form of Accuracy dependent on the path (ie. Magic path would have Magic Accuracy).
Slot 4: +1~20 Attack (60% chance of slot)
Pellucid stones raise the cap to 25, but do not affect the frequency.
Distribution appears flat.
There are no off-path augments for this slot.
Form of Attack dependent on the path (ie. Magic path would have Magic Attack).
Slot 5: +1~20 DMG (60% chance of slot)
Stones do not affect this slot.
Distribution appears flat.
There are no off-path augments for this slot.
Source:
Arcane Glyptics Inscriptions BgWiki