Smart ass answer is 'define wizard and define warrior'
...
More reasonable answer is give each their own cool thing. AD&D gave the warrior classes Followers. The wizard got high level spells, the warrior got an army to lead. FFG L5R gives Shugenja spells and rituals, and gives Bushi martial arts Kata that let them do things no Shugenja can dream of. In Shadowrun, the mage gets Metamagic... so just HR that something something magical interference, Magic Attribite does not let you have Alpha, Beta, or Deltaware. Or maybe give the Samurai access to their own metamagic stuff... like Otaku/Technomancers get access to MatrixMagic.
Ooooor redefine everything, D&D 4e style. This will piss everyone off, so fair warning.
Edit because spelling is hard