Cure III got a lot of use. PPl tend to under/over estimate this spell.
Blalbala, you need to adapt blablabla your mate, your Ivl, their Ilvl, your position, the damage of the incoming attack, your mp, their hp etc etc.
Cure III is fine but situational.

And if you face a lot of strong aoe with your AST like a3s*6.
Light speed/synastry is your friend