It has been mentioned to me several times that if I am playing a class that can #twoweapon, then I should most definitely #twoweapon. At some point. In the future. However, I am not entirely clear on when this "future" is. Should I wait until I reach Expert in one or more weapon skills or should I wait until I can comfortably kill nearly everything I encounter and have a substantial supply of food (and therefore farm some earlier levels for weapon experience)?
Given this information, I would suggest that once you have your intended main and off-hand weapons trained to those skill levels and you have enough AC without your shield to easily withstand hits from monsters at your level, that is when you should switch to