Huh? I'm trying to say that in the games I mentioned you use 4 characters at a time during battle, ie, you can have 4 characters fighting at the same time. Hell, in FF1, FF2, FF3 and FF5 you only have 4 characters total for the duration of the game!
You can cure yourself anyway through items.. and in FF7, the enemy skill White Wind won't be reflected, so as long as not ALL your characters are low on HP, you're good to go
No "Holy" is the magic that ends up saving the Earth. White Wind is a magic under the class of holy instead of fire, ice, lighting, earth, etc. White Wind curse you of ailments and doubles your current HP.
Holy is actually useable in later FF games as a very powerful offensive white magic, strength comparable to the strongest black magics. And Meteor too. In FF7 they made Meteor and Holy unuseable, but they are useable in later FFs