If you haven't already tried a thief, you should start as a fighter, then dual to thief at level 10-12, and change the kit to Assasin with Shadowkeeper. Its damn fun to basically go exploring by yourself as a thief. If you see an enemy, poison backstab the most dangerous looking one, quaff a potion of invisibility and backstab the next one. If you have plenty of potions you can take out large groups this way. Backstabbing with Celestial Fury with a 18/100 strength fighter/assassin almost isn't fair. But its fun
