and sometimes you just get hit hard, in which case, heal can't solve the problem. And there are some attacks that do 999 damage to you, such as Spekkio's Master Nu form. The attacks from that are very hard hitting. During normal game play, I agree, it's better to have someone who can heal everyone at once, but there are some instances in the game where they are no good to have in your party and you need Marle instead. That and Marle & Frog together make a great healing force.