400 potency (potentially 3200 pot total per use) heal every 30s
800 potency heal every 45s that can also be preplanned or used reactively.
600 potency aoe regen every 30s, coupled with 10% dmg reduction.
588 potency aoe regen every 60s for free & can be placed strategically.
Strongest single target regen
An ability to force some of their heals into critical heals + no resources required.
Free fairy ‘regen’ across the duration of encounter, 2100 potency per minute as long as she has somebody to heal constantly.
Fairy on steroid, a.k.a. Seraph.
Oh, and they’re all oGCD & can be used in combat.
I ain’t sure from where did you come up with ‘weak potency’ against SCH.
Lack of emergency heal? Solution: personal/group planning to not let that ‘emergency’ happens

How often do this ‘emergency’ happens? If it happens too much in one’s gameplay then they need to assess not only their own SCH (or basically any healer) performance, but also their party/group’s. Same goes to DRK’s [Living Dead]. Tanks never need their invuln in normal contents unless some stupidly disastrous behavior happens. For raiding, that’s why we have ‘cohealer’. Work together with them and walk out happily with your spoils.