You could focus on developing skills or powers that are not typically associated with healing. Maybe have a character specialize in combat or magic that isn't related to restoration.
You can try looking on popular manga reading websites like MangaDex or MangaFox. They often have a wide range of manga available, including Redo of Healer.
The appeal lies in the unexpectedness and the sense of wonder. Seeing someone heal instantly breaks the norm and adds a magical element. Also, it raises questions about the healer's origin and limits of their power, keeping us engaged.