Shisui would have easily melted the bullets as they came at him.

Cantus at such a level is simply overpowered. He even knew about the spies once he started to actively look for them. He simply let his guard down, and it cost him a powerful, albeit irritating and arrogant ally.

I really hope Yakomaru receives the protracted death promised this episode. I hate smarmy ambitious assholes.

Karma demons are karma demons because they can kill. Skill is irrelevant I believe, but as was shown in this episode, geniuses do exist regardless of moral inclination.