Honestly I'd be interested in something that makes use of a theme like spirit animals or something similar. It would be a healer that focuses on managing AoE style buffs/heals. For example: the user marks an ally and they each radiate a healing AoE around them and things of that nature.

It would end up being effects that you rotate through constantly like bard songs while the core kit is left bare bones in terms of healing. Bare bones as in just the basic necessities of a standard heal, raise, etc. Then the rest is focused on buffs/debuffs and sprinkles of dps.