Vocations

The four paths

Sorcerer - the heaviest damage in the game and the thinnest skin. You will kill things before they reach you, or you will die.
Druid - healing, area damage and support. The safest vocation to learn on, and the one every team wants.
Paladin - distance fighting. Good health, good damage, and you choose the range.
Knight - the most health and the best shielding, the least damage. You go first and you stay standing.

Promotion

Each vocation has a promoted form: Master Sorcerer, Elder Druid, Royal Paladin and Elite Knight. Promotion improves your health and mana regeneration and your capacity, and it is permanent.

Choosing

Pick by how you want to play, not by what is strongest. On an open PvP world with no protection level, a knight survives mistakes that would kill a sorcerer - but a sorcerer ends fights before mistakes happen.