farming is not really usefull for these items, offen when i find one from a monster. I keep farmng that species like 300..600 of em. never has that resulted in a 2nd drop.
And 1 in 600 is not really worth it.
Any chance someone could post the female ele Vabbian armor? I've got 1 character up to the quest to get in to Vabbi, so I'm almost there in terms of being able to gather the jewels.