Then again, the level you beat a dungeon is a somewhat dubious record. Better would be how many months it takes you to beat it. Someone training for gold rather than XP could have a level 289 scout with 14,000 dex and con.
Scouts seem to be better at beating dungeons but I don't think they overall have an advantage. My brother is a scout, only 2 levels behind me, and I'd say I beat him about 60% of the time in the arena. When battling against the guild demon portal I'd estimate I averaged around 4 million damage against the previous boss, while he probably averaged closer to 3.5 million. But one day out the blue he did 12 million damage--I don't think I ever broke 7 million. I guess sometimes he gets on a roll with evade and just cleans up.