One idea for this would be nature magic:
It would not have any healing magic, since that would be impossible to balance in PvE, as you would be able to unfairly heal infinitely.But, it could have weapon buffs, self buffs, projectiles, and AOE's.
An interesting aspect of nature magic could be that the spell effects would not necessarily have o originate at the location of the caster. So perhaps it could originate from a targeted location, allowing for new tactics.
It could be aimed, similar to a bow. First you would aim to determine the source, then the target. So, for example you could have vines grow out of the ground from any place on the ground within range, and they would travel a set distance dealing damage to whatever enemies they encounter along the way.