Cure III is only useful when people stack together and even then if you are stacked with them you might as well just use medica. If I'm not standing with them for whatever reason then I'll throw a cure III on somebody and hope to god they stay stacked long enough and don't dart around before the hit happens XD. Guide probably needs to talk more about preemptive stoneskin,virus etc instead of saying "That's the Scholar's job" it's what they are good at but what if you have no Scholar? One of you is going to have to figure out when to reduce damage on the Tank.

Odin has a nasty Tank specific attack and while doing the main story you will encounter Chrysalis which has one too in triple spark. Knowing when to protect the Tank can make life easier since you don't need to do a panic heal and god forbid waste benediction on a situation where you don't even need it.