yea when i'm solo i guess it isn't much of a issue but say for exaple my ally is wipeing/recovering i have the light spirit out while i cure and shell V or cures would be awsome at this stage but light spirit is like Regen > Regen > Haste (Trolol)

either way it's still pretty useful just would be more relible if it wasn't for haste(wind spell) and regen 1! (if it was regen IV i wouldn't mind as much)

Anther trick is that the spirit will only cast on the people it is faceing