"In the next update I will give more resources to make it easier. But here is a tip if you want to defeat her without potions: Go with Kanao. At the beginning of the battle, attack with your water skill, then kanao skill, then thunder skill, that reduce cooldown of all skills. And use the water skill every time you can. And use wisely the mana recovery skill. I think once or twice is enough." Stated by the creator