Thats not the evil path, but the psychopathic path. Sadly they get confused quite a lot, even by developers which is the reaso smart evil is so rare.
Interesting ..... Could you define Smart Evil? I'm thinking wipe out your enemies but still have enough bodies kicking around to bring you stuff and do your deeds etc...?
Reach your goal at the expense of others while also increasing your power/influence.
Wiping out everyone usually does not achieve this as you do not profit from it and is just being evil for evil's sake which is on the level of saturday morning cartoon villains.
