I dunno. She had a few "screw the consequences" moves in her earlier days as Magik. She tried to resurrect her brother that one time, and was convinced it worked, but he was actually alive and just playing along with her perception of the circumstances. She was also fully set to time travel to save the Morlocks from the massacre, but was talked out of it.
Most of her more "reckless" actions were done after Quest for Magik, when she was hellbent on reclaiming her bloodstone soul fragments and destroying the Elder Gods. Even after that, insisting she was no longer a threat to anyone -- getting incarcerated on Utopia and even put in an incendiary suit -- she still allowed her brother to become possessed to make a point. I suppose that last one isn't necessarily an example of reckless magic use, so much as just being a spiteful sibling? haha.