The Mortician's understanding of the human body gave him the ability to inflict fatal strikes in just a few attacks.
However, The Mortician's attacks might be devastating, but it had a clear weakness.
His weapon was too short. Its attack range couldn't even compare to a dagger's reach. In order for him to unleash his full potential, he must be given enough space and protection to dispose of the enemy.
One could say that the Mortician was suitable to be an Assassin, but his presence was just too cold. His coldness could probably freeze an entire city if he grew stronger enough and considering the fact that assassins needed to be incognito most of the time...
The Mortician just didn't fit such a specific role.
But there was one role that the Mortician was perfectly suitable with.
It was the role of a glass cannon.
Glass cannons were powerful but brittle.
If not given sufficient care, then they could easily shatter.