[Adventurers] Cannon Shooter

So basically it's only useful to classes that already have really high HP.

Should be most effective on Archers, Thieves and Magicians. And yes, I'm aware Magicians have Magic Guard but considering a dispel and single hit = instant death...

Archers, Thieves, and Magicians shouldn't have high defense (Excluding possibly Bandits/Shadowers...but really they would technically be in light gear for avoid and sacrifice the defense in a real situation). That's the whole point of those types of classes, to do high damage but also have low defenses, basically glass cannons. Though in terms of Archers, they should have more Max HP, simply because later generic monsters do your entire HP bar in touch damage (Which is why I quit my KMS Bowmaster). I don't know how it is for Thieves, I never really mained in a Thief character, but Magicians have Magic Guard, and while MG can be Dispelled, that's just part of playing the class.

I don't have a problem with taking a lot of damage, however every character should have a way to survive more than 1-2 hits. It's just really idiotic when something can spawn on top of you and kill you instantly, there's absolutely nothing you can do about that!