Named outside of castle drop augs. Named inside castle (except D'vinn) drop loot that is low tier GoD stuff which is equal or worse than Time loot. D'vinn has CBQ quest loot which are mostly all upgrades. Lodestar is the best range slot and 2h weapon in game from him.
Overall, the named and trash have a ton of HP and have an ability every X seconds to summon 0, 1, or 2 adds. It's quite easy to get overrun with some bad luck double spawn adds. I wouldn't suggest them without at least 6 chars in nearly max gear and dps heavy. Worst part is, if you wipe, the adds remain where they were summoned. Seen a few dumb groups fight at zone in, then wipe to half a dozen summoned adds then have them sit and corpse camp the zone in.