I've always played a healer in many MMOs, and I've always been a fan of the swords. With that weird combination, I will be either STR/MND or DEX/MND, but I will most likely op for DEX/MND so that I can use the bow to pick out monster in a crowds and when fighting bosses.
So I will end up carrying 2 bows, 1 twin sword, and 1 staff. There's really no point in sticking to a single weapon for all situations, specifically putting myself in a disadvantage situation. The major downside is that I have to put time aside to level up my skills.