Vis Maior has downed the Twin Eredars on PTR 2.4 and the loot is so exquisite.  The Shroud of Redeemed Souls is the best cloak for healers I have seen, with 27 stamina, 24 intellect, 73 healing and damage done by 25 and 13 mana regeneration.

The Twin Eredars may be found at the Sunwell Plateau, a 25-man raid dungeon.