I'm a bit unclear. With so many professions, where does the differentiation lie? What are the differences at the beginning of the game? Is it only a matter of health points? Then, what's the significance of having different professions?
All the different skills "belong" to one base profession and they are way more likely to appear when playing. Quite a lot of the professions are combinations of two base ones for example (if I remember correctly) palading is cleric + fighter.
