I expect we will also find more of the set the Quicksilvered came from (Based on the necro Bloodseer's set) for 'sins coming out of Xib soon. I'm planning to spend some more time there myself attempting to find a 'sin helm down there, which I'm convinced will be a derivation of the "Necromancer's Head" model, as it visually matches the Quicksilvered.
EDIT2: The more I compare the Quicksilvered Leggings to the Necromancer's Legs, the more I wonder if those are infact just Necro gear... Would that mean we simply haven't seen 'Sin gear dropping in Xib yet? If that is just Necro gear, then perhaps Xib still holds renamed, 80 blue gear based on the Assassin's set shown in yg? Which would be a shame, as it's stuff we've seen the models for already... Maybe I can be hopeful someone will loot an 80 upgrade to the Alcippe (Main System) gear...
Nice adds Jnoh. Yes i did miss a few of those. I hadnt "forgotten" the Xib stuff....but then i forgot to add it lol.
Have posted in the guide where the drops can be found - as much as I can.
Some of them I just am not sure on where they drop exactly.
Other things - such as the "Set" gears like Twilights and Midnights are not necessarily found from any specific "boss" but rather can drop off any boss in an epic zone of that level, or the BoE stuff can drop from any MOB of that level, for instance.