Plenary Indulgence fix? Possible ways to make it a better spell.

[Marimeia]

Let's face it, Plenary Indulgence for a level 70 spell kind of sucks. The Confession mechanic, while unique and interesting to a point, isn't that useable. You can't use it as an AoE heal with any reliability due to how the Confession stacks, that don't proc that often, are on one target.

So.... I came up with this:
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Plenary Indulgence:

Cast: Instant Recast: 15 Seconds

Restores HP of party member with Confession; Potency varies with current Confession stack. Healing potency for party members in range is reduced by 10% for the second ally, 20% for the third, 30% for the fourth, and 40% for all remaining allies within range. Healing drop off determined by proximity to target with Confession. Allies healed in this manner do not require Confession stacks to receive healing.

(Rest of spell reads as it does now)
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This way, it can still be used as a single target heal, and has a side benefit of some, but not overwhelming, AoE healing ability.