I think there will probably be changes to how Raise works in this next expansion, given their experiments with it in the Variant/Criterion system. I think for lower difficulty content, having access to multiple raises across multiple party members is important. Your healers might not know the fight at all and may really struggle with mechanics, but the game design will still aim to help them through to experience the story, like the current raise system allows. Where it could change is in harder difficulty settings for the same fight, where you could situationally restrict the number of times you can cast raise (per specific teammate, or per group), or lock it behind a timer. You could even have 'checkpoints' where your raise uses are restored. Under such a system, you probably could have a lot of different jobs providing a raise alternatives. It could even be a channeled character action, like 'Assist' or 'Help Up', as long as there's a cap on uses per fight.