Mereoleona, alone, managed to beat with difficulty who I was considered the wizard king(funnybunny prince) and needed Yami, Nozel, and Yuno to beat Jesrer and they still suffered a lot to do so. Not to mention the fact that Mereoleona, who doesn't consider it so rare because fire has several, she trained a lot to reach this level, in addition to most normal mages, such as users of fire, lightning or water, needs something to get strong or learn the runes of the kingdom of hearth or a magical beast, and she doesn't have any of that, it's just a lot of training and brute strength
I have a video idea: Black Clover Captains + Mereoleona react to Leopold I haven’t seen those recently so I’d appreciate it, you don’t have to do it, but it’s a recommendation since there’s basically only one of those.