I will be more then happy if the redesign lolwell to first healing pet. I can think of two variants:
1. temporary pet: You place a Lighwell in place and you get pet bar for it with two-three skills. Something like water elemental for mages. Last about 45 seconds with 3-4 minutes cooldown. Immobile.
2. permanent pet: Using some kind of resource to fuel it's heals. For example it can use charges as resource. Some weaker spells can grant charges, the more powerful skills reduce number of charges. Mana or cooldowns will be fine too.
As for skills it could be some very simple like direct heals, hots or it could be some kind of utility (granting buffs that increase your spells, moving your ProM to another target, some kind of switfmend for renew).
What you guys think of that ?