i honestly think making cure V only accessible through a stratagem is an absolutely horrible idea doing so would inhibit scholars flexibility.
think about this you would be wasting all of your stratagems just to cast a decent cure.
if anything i believe a healing type helix would make more sense say a base of 200-300 hp and then repeat for a minute giving 100 hp or so.
sorry my bad only way id see it being ok if its only allowed under addendum