Why does the Magician archetype's Spellshape Strike function so differently from its core spellshaping analogue, the Spellshape Champion's Spellshape Channeling? For consistency and to avoid confusion, if nothing else, I'd recommend changing Spellshape Strike to work as Spellshape Channeling. If you want to add the bonus damage on top, that should be a separate class feature (possibly replacing Strike of Justice; they're already mutually exclusive in usage, anyways).