Actually they didn't, he's talking about dueling, but it's obvious that some people are talking about dual-CLASSing.
I personally like the monk in duels. 7 Attacks per round (depending on how you build). Stunning Fist, Improved Knockdown, Parry (VERY underrated skill IMO), and Monk Speed. Only complaint is the lower HP, but still, with a haste robe, that leaves your feet slot free for Boots of Striding.
"Gentlemen! You can't fight in here! This is the war room!" -Dr. StrangeLove
"Never in my life could I have afforded to be raised!" -Fezhak
"I don't want to meet someone who shares my interests. I hate my interests." - Steve Buscemi Ghost World