Are these recent numbers, or do they date back a while? Only reason I ask is that I took Fradul in on Normal with a 56 AC, and she hit him 13 times out of 27. Unfortunately, that was all my combat log would hold, so I couldn't get more data.
If she wasn't just getting a bunch of lucky rolls, then an AC of 66 should put you into grazing hits and nat 20's only. At least, from the queen... the archers didn't seem to have any problem hitting.
Kaelth's Touch (DR 5/evil) helped a bit with the archers piercing damage, and combing through the combat log reminded me that I hadn't cast Sonic Resist![]()