Treasure Sorter Neiben will spawn from it's PH, "A Shady Treasure Sorter".
There are four area's in which you can find this PH. I have added red labels to the map, "TREASURE HOUSE".
P 1104.2349, 283.0840, 1.1582, 240, 0, 0, 2, TREASURE_HOUSE
P 916.6885, 101.9983, 1.1582, 240, 0, 0, 2, TREASURE_HOUSE
P 245.9288, 109.6780, 1.0020, 240, 0, 0, 2, TREASURE_HOUSE
P 1297.5076, -45.3971, 1.1582, 240, 0, 0, 2, TREASURE_HOUSE
To spawn him, kill everything inside of these 4 buildings including the singular mob right outside the entrance (if there is one).
Took about 3 cycles of killing to get him to spawn. Repops take ~15 minutes.
Drop Prismatic Crystal [Dulak's Harbor]] for Wizard 1.5. Don't bother looking for ground spawns.
[Sever - Thornblade]
Edited, Dec 18th 2022 1:20pm by Sporky