A battle can easily be won by quaffing a few of the correct potions before or during the melee. Their potions are only moderately useful to themselves, and they must spend hours collecting the correct ingredients to mix their potions. Ninjas are the masters of the art of assassination. They have the greatest potential to deal large amounts of damage using the backstab and circle skills. They also have mastered other dark-art skills to render their opponents blind or unable to cast spells.
Ninjas are very stealthy and can hide, sneak, and cover up their own tracks.
They are very good at targeting an individual, even one who is being guarded by a templar. They can also retreat out of battle easier than other professions. They can't deal a large amount of damage in a melee combat or with spells, and they must resort to good planning and good timing in order to damage their opponents. They also improve rather slowly at first, and have to rely on pure skill instead of poisons to do damage with their backstabs and circles.