You get the -1 armlets from dynamis Buburimu. The mob that dropped them for me were the birds. I only wish they had accepted my screenshot along with the stats that I e-mailed to them for this.
You need the Assassin's Armlets, Assassin's Armlets -1, sheep chammy, and 28 Tukuku whiteshells. Trade these items to Sagheera (the limbus NPC) and you will get the +1 after the next conquest tally.
lets concentrate on posting how to aquire these relics please i hate when i come on all i read about is who is the better tank. who cares if you good your good if your great then eveyone will know your name