Lightwell becomes something like a soul well for priests, giving party and raid members a ball of pure light when they click on the well, this ball lasts until you log out for 15 minutes. Every time you click the ball it gives you a charge from the lightwell and has a 10 second cd, if the lightwell runs out of charges the ball stops glowing until a new one is cast.
The priest also gets a small spell along with it that when cast, causes lightwell to become tethered to you with a rope light, enabling you to move it around, clicking the spell again will make lightwell stationary.
Or perhaps A type of PoM that heals then instantly jumps continuously to the next target until all 5 charges are used.