Sword-master

I checked the sticky, and it doesn't look like this idea is taken.
The name Blade Master is probably terrible, feel free to make up a better one.
The idea of blade master is that it is a smarter troop.
It will range around an enemies base, looking for storages or defenses to attack, however, it will wait until it finds one without defenses, distracted defenses, or little defenses, and will then dash in and start cutting. It will never attack barracks or army camps or such unless absolutely necessary. It might run away if it is being hurt, possibly move towards a healer. It could also run away if a better target opens up.
Against other units, it will attempt to sneak around and kill the support troops, such as healers, wizards, witches, etc.
Any thoughts?
Terrible idea?
Wonderful idea?
okay idea?
cool idea but will never be implemented?