Icy Assassin also seems like a dandy way to be really evil and profit from it. Yes, you can use it to eliminate and replace influential individuals, but that always carries the risk of detection. Better by far to create the assassin and learn EVERYTHING the subject knows from it--all his deepest, darkest, nastiest secrets.
If the target is subject to blackmail and has the influence to be worth blackmailing, do it.
If the target has weaknesses, exploit them.
If the target has secret caches of wealth, loot them.
If the target objects, eliminate him.