I want "VerEsuna" or whatever. Healers really hate pressing Esuna and I don't mind doing it for them. I'm like half-joking. Ha.
Wouldn't mind upgraded versions of Veraero II and Verthunder II in the same way Verholy and Verflare work. Maybe a new sword AoE for a one-two combo into it. The idea would be to Veraero II/Verthunder II > Impact > maybe until like 60 mana > Enchanted Moulinet > Enchanted [new combo finisher] > VerHoly II / VerFlare II. Maybe that's a bit too samey relative to the single-target rotation. I personally don't like spamming Enchanted Moulinet to spend mana and would welcome any change to that.
I think it would make make Manafication more interesting/fun for me, too. I dislike using Manafication in AoE situations because the end result of that is really just more Enchanted Moulinets. With an actual AoE combo, its function in AoE would be similar in that you would use it to either get to the "enchanted" part of the AoE more quickly or to keep the chain going. Similar end results, just more fun since it wouldn't mean more Enchanted Moulinets but rather an extra VerHoly II or VerFlare II.
I would also like Acceleration to be useful in AoE. I'm not sure how without making it kind of boring. But, just a slight increase to mana gain on Veraero II and Verthunder II would be fine. I don't want AoE versions of Verstone or Verfire. I'm sure there is a more creative answer to this.
So! One new ability in the new AoE sword combo, upgraded versions of Veraero II and Verthunder II that don't take up space on the hotbar, and some tweaks to numbers and existing abilities to accommodate. And, maybe VerEsuna...
Edit: I just want anything besides "Spam Enchanted Moulinet 5 times". The joke towards healers aside, I really like RDM's non-DPS abilities. VerEsuna would just be a minor increase to that and be in the same vein as Vercure. Something you pretty much never use, but feels nice when it works.