Noob?
Fighter/Berserker.
It limits your ranged weapon choices to throwing darts and knives, I think. Which is best because it simplifies your selection. Also, going berserk protects you from the nasty ass super Liches late in the game. And maybe that one special mage who can cast Imprisonment as a spell.
Also, I recommend you pick battle axes to use Azure Edge, which Korgan can not, cuz he's evil.
OR, a thief, cuz in the game your main thief disappears (wont spoil it for you) and your dual class thieves dont level up. Your multi-class thief might get on your nerves. Also, he levels so slowly you might not be able to disable some stronger traps or locks when you first see them.
If you do use Jan, put all his points into traps and locks, forget the other skills, they are much less important.