The problem with Freecure, and similarly with ASTs crit Benefic II, is that the proc is the opposite way round to what is optimal.

Cure II should have a chance at proccing a crit or buffed Cure I, basically making Cure I the same potency as Cure II.
This way you save MP by healing the same amount of HP as Cure II, but with the MP cost of a Cure I.
Cure III should have a similar proc that turns Cure I into an AoE. Call it... Fullcure.


For AST I'd just have Benefic II downright replace Benefic I tbh.