Originally Posted by Barbarian
Assassins can be useful, if you train them slowly, so that they gain experience before taking out tougher targets. It is good to ensure that they have 40% - 90% possibility of killing the target
I usually send them first against captains (armies with no family members leading them), then, against other agents, like diplomats, then, when they are experienced enough, against low ranking family members. And an assassin with 9 or 10 "eyes" can actually try killing rival faction leaders.
If you are a Roman faction, you can gain offices in Senate by getting rid if opponents this way.
Also, smaller factions can be destroyed, if all their family members die in the same turn.