Considering that, what exactly is the hp regen rate? If its at the same rate the poison maps deplete hp then I can see her as a unit that prefers to not fight enemies back to back compared to most other units that block more than one unit at a time.
Also seeing as how her event comes with a possible introduction to the Feng Shui User unit type, what exactly does her skill do? Translating their skills is like looking at a travesty.