My favorite - not most optimal, but fun for its silliness - is to use light crossbows, dual-wielding, quick draw, and rapid shot with a specially-modified cloak or coat that has the light crossbows on 2-3 foot straps so you can draw and drop them. It's -6 to hit without some extra care taken, but you get two extra attacks over normal. In PF, there's a paladin spell (blade tutor's spirit) that, at high enough level, can negate the penalties.