Hrm. I don't really see it. It doesn't seem to bring anything new that isn't already covered with the healers we have already, and the backstory is very similar to white mage.

In fact whm has plenty of HoT already with regen, medica 2, and asylum - all which can be stacked if required. Add to this that a lot of whms already do a lot of their healing using these HoT so that they can stance dance - I just don't see anything new here that would warrant the dev time.