Only Fabled Warden and this guy drop the fabled pouches for the ring quest, and Fabled Warden camped round the clock, was happy to find this guy, he can actually pop in 2 places at left and right of the corridor that he spawns in. There's a nice sofa on both ends, if you keep both rooms down (dead) you'll see him spawn in both, 2 hour timer.
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Toucan Tanksem of Vallon Zek, Sebilis, Venril Sathir, Antonius Bayle, and now Toukan of Povar
Or you can levitate, go up on the front balcony walk area of the ramp on the same level as the door, walk up the part of the wall that isn't fully vertical and levitate over on top of the door. Now either drop levitate or wiggle your way down, and eventually you will drop out on the other side of the door.