Is it possible to defeat the flaming guardian in chapter 5 dungeon 1?

You can defeat them but it is hard. First it is good to your character should elite warrior he have a magic to defend from external attack When you activate the shield. Activating the shield can resist the flame from the guardian then try to go to catch the unigue (it is not the common) diamond around the guardian. Handle the diamond decrease the power of the guardian. Then attack on him with activating the shield. I can do that.