How does evertone think this would work? Take fighter levels until you qualify for DS and then switch to DS and keep with it from then on. Instead of using a longbow use a light crossbow. With a longbow a DS can get their threat to 18-20. With a crossbow they get their threat to 15-20 and taking a lot of levels in DS means that your crit multi will still be high. (x7 or so at lvl 30?) So couple a wide threat range with a high multi and you're going be seeming some high damage a lot.