I'm not a jack-of-all-trades when it comes to magic like the others, but I've dabbled.

You could learn a wide range, or you could try to specialize your magic. Like the way I've mixed magic with my ability to wield darkness. I know you don't want to use the abilities you already have, but you could try leaning into it a little.

[ A thoughtful hum.]

Water magic would suit you, I think. There's a lot you could do with water, both attacking and protecting. Then using water in tandem with your own abilities, to create illusions. Like Demyx and his water clones.