Blaze Magician the weakest koc???

Not only that they suck at bossing, but they also cannot heal without using potions either. At first when I saw the Knights of Cygnus, Fire Pillar tends to heal AND attack, but now it only attacks, so Nexon took Fire Pillar away from heal.

Fire Pillar never healed in the first place. Nexon Korea just used a recolored Heal icon as a placeholder like they do with every single new skill they create.