This had been discussed on Reddit and doesn't work.
First 1.3k is low compared to the 1.5k of a Cure II and for the same MP cost.
Second, the cast time of SS is 3 seconds where as Cure II is 2.5. So even if Cure II and SS had same values, the Cure II would still be the winner. In fact, to be as good as Cure II in terms of healing output or healing per GCP, SS needs 20% more value than Cure II.