I'm pretty sure Diablo was a 20 minute fight for my team. Which consisted 3 under leveled characters (46 demon hunter, 45 witch doctor and barb) and one lvl 49 wizard. To even kill the trash we had to just super kite it forever, and for Diablo basically everyone died in the black phase except one, who kited until our clones disappeared and rezzed everyone else, and then we basically stunned her to death. Like, she was stunned for 2 seconds every 4 seconds.
Oh and did I mention that none of the bosses in Nightmare drop yellow items? Except for this one wand I got off Diablo, none of the other bosses dropped shit for shit. I was under the impression that they dropped a yellow the first time you killed a big boss no matter what, but nope, they drop blue items that are worse than things I find off of dead bodies in the middle of a level.
Hell is gonna be a !@#$%, and I'm not sure how much I'm looking forward to it if act 4 Nightmare was this hard >.>