Pros and Cons of each Healer Role

[Mimilu]

+ Pro
~ Meh
- Con

AST
+Cards can give great raid utility
+Great MP recovery with Luminiferous Aether and Ewer with Celestial Opposition
+Lightspeed, Aspected Benefic, and Benefic II's healing proc allow you to be very mobile and provide instantaneous heals
+Diurnal Sect's 5% Attack Speed increase can make you one of the more faster healers
+Nocturnal Sect's 5% Healing Potency increase can make your core, vanilla heals (Benefic, Benefic II, Helios) the strongest
+Nocturnal Sect's shields have a x1.3 multiplier on the at all times, compared to SCH's x2 multiplier that only comes with crits
+Synastry provides a cost-free way to heal two partymembers at once OR healing a single target twice (for only 40% of the original heal)
+Time Dilation and Celestial Opposition can lengthen all card buffs, HoTs, and Collective Unconscious. Celestial Opposition can also lengthen your Celestial Opposition and Synastry's effect on you and the target
+Combut and Combust II are both unaspected and won't miss/be evaded (unless there's a battle mechanic involved)

~DPS is Average, better Sustained Damage then WHM, better Burst then SCH
~Collective Unconscious can be harder to use then Asylum and Sacred Soil due to you not being allowed to move and having to wait 2 seconds for its effects to kick in. However, you can increase the amount of time the buffs are up with Time Dilation and Celestial Opposition. And it
~A bit of a learning curve having to learn how to use Sects, cards, and only having one burst oGCD heal.

-Nocturnal can be extremely lackluster compared to Diurnal, lacking the synergy Diurnal has with Time Dilation and Celestial Opposition, lowers your DPS because of loosing out on Diurnal's 5% Attack Speed increase, AND it is completely unusable with a SCH in the party.
-Cards can be unreliable (although it is a smidgen better with Shuffle no longer being able to draw the same card)
-Only has 2 oGCD heals, Essential Dignity (burst heal) and Collective Unconscious (HoT)
-Off-healing kit just can't compete with SCH's kit. You'll usually end up as the main healer in statics.