I think its just that, while its fun to have a WAR/SMN..during an exp party its best to specialize and push your strengths and not do a subpar job of what your suppose to do. Which is why i dont use Sword despite i am going PLD during WAR. To the person Searching...who is more likely to be soloing/newb? The WAR/WHM or WAR/MNK? You cant tell..and to the leader...your going to go the more safe route so you dont waste time and money(food right?) exping.

MNK/WHM = HNM Chi Blast power. MND directly affects the power of Chi Blast so thats the only time you use it.