How strong is Taliyah in the lore?

I haven't really read much about her since the Shurima event, but from what I can remember she's pretty up there in terms of what regular old mortals can do. She knocked out Yasuo by accidentally creating an avalanche, saved Nasus from Xerath while just sort of passing through an area, and was holding her own against Xerath in "The Climb" cinematic. How strong is she? Would she mop the floor with other elementalists like Qiyana, Lissandra and Brand?
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