I heard from several people ingame that the class which I'm building towards (I have a pretty high Polearm level with my level 10 Warrior), Dragoon, doesn't make a very good tank. Is it possible to use Warrior as a subjob to make the Dragoon a good tank? Aren't Dragoons one of the heaviest hitters also? Which is best for melee combat out of Dragoon, Ninja, Paladin, Samurai in terms of offense and defense? Which of these pairs best with Warrior?