Quote Originally Posted by Ibn Munqidh
How do u guys get such skilled assasins? Mine only last for a couple of kills, and then they get killed, never getting the chance of developing.

*g*
Accept the assassin guilds in your assassin producing cities. Then train them on low level merchants, priests, or captains. Preferably on rebels, or other hostile factions. Caught assassins aren't good for relations between nations as you might expect.