In Dragon Necropolis: General location -480, -560, -245 (outside Zlandicar's lair); can be warriors (summon) or necromancers (do not summon); ~15 minute respawn time.
immediately adjacent to zlandicar's lair there are two spawns right next to each other, both mobs that spawn there tend to be hoarders. occasionally one will be "a chetari packrat" or the whelp kidnapper. i have seen the hoarders levels as high up as 62. the necromancer hoarders do not summon. the warrior ones do summon. however, they only summon every 12 seconds so its very possible to kite them anyways.
on a similar subject~ i was farming for the whelp kidnapper and got a book drop off of a necromancer hoarder, "unkempt seed rituals".
Enter the Tunnels and follow them south. Take the West split and the 2nd to last large cavern room, there are 2 of them there. Fought a few of them. They cast, They summon, they have a lot of HP, they hit hard (200's) and they gate. Not all summon, but cant tell which one do and which dont. They snare and root and have nukes as well as dots and dispell. Gee, what dont they have? OH, they dont heal. hehe.
They drop this fairly often.
Chetari Bonecrafted Shield Back / Secondary AC:19 SV Fire +10