in most situations where you'd use nin for first voke/DD mirke acc+dw will normally come out on top, this is only because being able to cap acc w/o a body piece or have low enough atk that haub+1 will pull ahead are more extreme cases most of the time (the latter you would normally use a 2-h dd/nin or even go full out tank mode with /drk or other options). there's a good bit of math done on the subject that you could probably look up, but it'll require digging (brain goes put-put-kaput w/o the incentive of lulz or the like these days, lol).