As far as non-healer sustain is concerned…

I don’t mind Paladin having things like intervention and divine veil. It’s very appropriate thematically and Paladin could stand out better as a support tank.

Warrior on the other hand… I like that it focuses on healing off damage rather than mitigating it, but I don’t understand how Shake it Off is supposed to fit Warrior thematically, at least in the way it functions. I’d consider taking out Warriors party healing/barriers and some of its self healing, the replace that with buffs that are about increasing healing received. For example, equilibrium could increase HP restored to the Warrior through healing actions. Perhaps Bloodwhetting still exists, but with a longer cooldown so Warrior can still heal themselves, but is more about elevating the healers rather than replacing them.

I have no idea why Reaper can heal. That seems completely out of place on that job and I wouldn’t have added it at all in the first place.

Increased healing received from things like magick barrier, nature’s minne, and mantra I think are fine. Those can’t take the place of healers but they can certainly be helpful.

Without going into a whole Summoner discussion, assuming it largely stays the same for the sake of this discussion, I’d replace Phoenix with Alexander, then rework summon Phoenix as a long cooldown alternative to your Ifrit/Titan/Garuda—which is to say you can summon Phoenix instead of one of them per 2… maybe 3 minutes. The damage is the lowest of the bunch but offers that party regen and Enkindle is not just a single target regen but also an instant raise at the same time. This makes Phoenix a choice you get to make while also giving you more control on the timing of this utility.

As for Dancer, I think curing waltz is fine. It’s thematic and connects to Dancer’s roots while having enough restrictions that it’s not too overwhelming. I’d replace improvisation though. It’s an awkward ability regardless, and I’d rather swap it out for chocobo jig, a party combat sprint.