It's definitely possible in the Den. If you get a jailer/waller/molten mob, they will drop a "lesser health potion" - those are like level 10 items, which puts it in the range where a ring could drop.
I haven't gotten a ring from there yet; but I did get a 20 DPS white bow (LOL!) which was kind of interesting. That item made me rethink how I was going to play on 5/15. I was going to run the skeleton king twice; just to make sure I'm kind of optimized for the new areas; but now I think I won't waste the time.
Great analisys! I also noticed that it's quite fruitfull to farm the Den of the Fallen, but I always checked the whole Weeping Hollow to find it. Now I'll be able to check it faster. Thanx.
As to the difficulty of co-op games, call me a non-believer. I don't think that monsters having a bit more hp will be so much harder to kill. Maybe, and I say maybe, on inferno, when you try to solo in a game consisting 4 players you would have problems with champion/elite packs. But on normal? Please...
Would just like to say that i have encountered the Jailor affix (and another one, cant remember the name, but when you melee it it shoots out lightnings, just like mobs in D2) in the cathedral after patch 15 was deployed.
This is what i do, i set my quest to the second one of the shattered crown, walk into the gate and search for the first 2 tiles, if den doesnt appear i log out, and hit resume. You will be placed after the bridge. I walk another 2 tiles searching for den, if found get in if not log out, remuse, repeat over and over. In 5 log outs, 2 of them get me den near the first 2 tiles.
And i actualy found molten wich dropped me a magical superior bow and mace, wich were crap, and got some resonable rare bracers inside the chest. got 59% mf.
Ps: correction molten dropped a 19.6 dps crossbow.