Rivervale never dropped anything decent for me. Ive never seen the nightbloods there drop something interesting.
At your level I was wandering around in Permafrost and Solusek's eye. PF was cool, i liked how it looked, loot was ok. With revamped SE lately I heard it is a good place to adventure too. If you are patient enough to do the accesses in the Obelisk of Lost Souls (patient because at first you will have to fight level 37ish mobs) you can find mobs up to level 50 in there and theres decent loot tables in there (i played almost exclusively there for level 38-45...was by far my favorite T5 zone)
Don't forget though that in the past months they have revamped RE and RoV's loot tables, that is why you now find some fat loot in there. It wasnt the case, like, lets say, 6 months ago, and it was to the point that I was farming into CoB instead of RoV because loot was much better there + it's always empty and I had all the nameds for myself hehehehehehe.
So I would give a try to SE if I were you, they did the same with that zone they did with RE and RoV, which means (prolly, havent been there since) every named and their grandmother will drop a master chest with some fat loot in it. PF is cool looking, you might want to try your luck there, also obelisk is ok, drops some decent ebon gear that is an upgrade for a lot of other common dropped gear. If I were you I would stay far from Cazic-Thule, unless you have some business there, its the crappiest of the T5 zones, xp is not nearly as good as other T5 zones and loot is...pathetic, except some of the named mobs for screaming mace, but even then, they are often camped for that said HQ...just my opinion over stuff ive seen over time. Of course you are free to do what you want :)
And that epic you took in RV I think never drops anything :/ The level 45 one though drops some stuff if you ever want to try your luck on him.
EDITED - Also when you reach the near level 50 mark, there is return to nek castle that is fun to do (plan about 4-5 hours for the first time) loot is ok, nothing to blow your head over a wall, but Everling can drop some neat stuff (hes hard if you go there before everyone is 50). You need a special access quest to complete it, that you grab(bed) when you first take care of the first instance of Nek Castle.
Edited, Thu Mar 9 16:02:16 2006 by ThatGuyRandom