I agree with SX. UDL is probably the best place to get decent (glands top) loot. When I start lvling a new char, I almost always go into a UDL sometime between level 5-15 (small group or solo) and go really slowly and clear the whole dungeon. I usually end up with at least half of gland tops equip for my char. The key to doing it is being very slow and careful, luring only a few mobs at a time. And know when to nexus (getting rushed by slow/quiet mobs and getting hit by a slow, etc.)
edit: clarification