Assassination
Assassins make good money. Unfortunatly there is not enough work as an assassin to make a good living. Yes you get paid very well for the occaisonal job, but they are few and far between. It mostly depends on where you are. If the land has a lot of corruption in the local government, then you WILL get a lot of work.(if your good) But unless there are an overabundance of very bad men, generally people dont want them killed. Go figure.
  

You must use your skills wisley as an assassin. You cannot just walk up to somone and run them through, unless there is no other option. (and your really good) That also brings up the problem about combat. As a thief/assassin, open field combat is a no-no. Moslty because unless your really good at it, your going to die. Try to get being them without them noticing. Once there you can cut thier throat. As a rule in Conquest states "if thy throat is cut by a thief/assassin you CANNOT scream. and thus CANNOT draw attention to yourself in any way."  

Which is good for us. Of course you have tools that can help you greatly. See the "thieving" section. All in all assassination can be pretty fun. Just be sure your assassinating the right person. Or else you could be next.