EDIT: Hm...I dunno, I just find it very limited being single target and SGE having no Deployment Tactics-like mechanic. Krasis, that is. SCH with Recitation and Protraction makes sense because I can Spredlo the super shield it generates with Adlo. SGE doesn't have that, so I tend not to think of it that way. Though I guess I DO use Zoe like that. I also often use Zoe with Pneuma because...it's a frankly absurd amount of healing. 600 + 50% is a 900 potency AOE heal for the entire party. It's like party-wide Cure 2 that also shoots a big flashy laser that...well...only does 1 Dosis worth of damage, but it still looks pretty.

Party Cure 2 is just bonkers. It's actually stronger than that, since Cure 2 is only 800 potency (1/8th or 12.5% stronger). Pneuma is the same heal as Cure 3 (though DPS neutral), but with Zoe, it's probably the most powerful bulk heal in the game. AST may have something crazy, but I don't know that WHM or SCH have, under self buffs only, anything to match that level of raw healing. MAYBE Fey Illumination + Recitation + Indom on SCH.
WHM can provide more healing via sustain, and Cure 3 + Assize weave does a bit more (1,000 partywide), but requires Assize being up.
Needless to say, pairing Zoe with Pneuma can generate some nice results.
Though I didn't think Krasis boosted Kardia/Soteria healing. I guess I hadn't considered Dosis' healing to be classified as a "healing spell" as I thought the Kardion effect was kind of its own thing. But if so, that's amazing. Going to have to keep that one in my back pocket now.
