Grieg's End is good. Mobs can drop up to 12pp and cash items like gems are fairly common. Named there drop solid tribute also. One named past the gate (Khemot something) can drop a book of impracticality 15k tribute. Droga is another good place. Mobs can drop as much as 21pp each, but the zone is screwed up. It was patched a while ago and spots where named used to spawn, dont anymore. Mob levels are strange too, I cleared one room, 2 mobs were dark blue to me at 70, the other was green. Sirens Grotto is pretty decent as well, lots of quest gems, and people buy deepwater ink for tradeskills, some nice tribute stuff (netted kelp, etc) and I have gotten crushed diamond dust there a few times, sells for 3-4kpp on my server. Dont overlook stuff like crystalized sulfur either. I sell them cheap for 10pp each, and they are gone within minutes of me setting up my trader.