What determines that amount of experience that one gets from completing a mission?
Also, what makes classes like Finders and Bookmen special enough for people to want to be them? I am a little iffy about why anyone would want to be a finder, as they simply "find" stuff for the exorcists and prepare the scene for exorcist actions. Bookmen - learning stuff helps with what? Supporter - what can they do to help, other than give funds and the like. Scientists - what makes them so special?