Another comparation between AST and WHM

[Roxas_Andrade]

The +5% healing bonus is not available to Aspected (Dirunal) Benefic.
Also, while Collective Unconscious (Dirunal) has a potential of 1200 total potency, I don't think you'll find many AST's actually letting it run for the whole 18 seconds. Compared to Asylum, which is set-and-forget and still allows you to continue casting. Asylum can be used on the tank/melee and combined with Regen/Medica II to produce a really potent HoT tick for the tank; CU is a little more situational in comparison (which is why it has a higher base potency, I imagine), and while it's still useful it has less applicable uses compared to Asylum.

The +5% healing potency for diurnal is what I've suggested in the post. Tottaly agree with your CU opinion. ^.^ Maybe the skill could activate a CD based on how long we used it. If we used for half the duration of the spell, CD would activate for half the time. Is it possible?