Last week when I ran on Normal everything went well until Sorjek. We had an awesome 18th level group of 6 with two dps fighers, a cleric who was very good, somone else (can't remember now), and my Sorc. I used 9 Major Elixers and kept up maximized empowered firewalls but Sorjek would not go down. It had to be the bug. Our group vowed not to try again until the scaling bug was fixed, but it is nice to hear that Hard may not be bugged.
Cheers.