How Viable is Demon Slayer at Bossing?

Thanks for the input. A pet is probably a good idea since I'm not the best at watching my HP. Good to know they can do well against DR as well, that is the most annoying status effect in the game.

No problem! Autopot is very convenient

Yep. As long as you know how to time when to bind, or when the damage reflect of the boss starts, it's very useful. It also can be used right before or after Magic Crash, which is extremely handy if you plan on going bossing with warrior friends or guildmates.