AST Sect Theory

[Apeiron]

Your choice to ignore HoT healing/rolling from A. Benefic and A. Helios doesn't make it nonexistent; however, you refusal to acknowledge the benefit of rolling HoTs in exchange for +5% healing on three heals is ironic.

I'm not ignoring it, or say it doesn't exist, I'm saying to get the most out of regens, they have to do a few things:
1) heal more than incoming damage to be an actual benefit, otherwise they're a lesser mitigation that can be replaced by shields, and you or your co-healer are forced to spam more healing spells to make up the difference than should be necessary.
2) not be used on a party member whose health is already topped off, if you have this scenario then your regens aren't being used and you have ticks being wasted. Again this doesn't necessarily hurt the party, but it doesn't benefit them either, and shouldn't be counted towards overall healing. Your party members don't need the healing at that point.

A. Benefic only gives you the full 790 potency overall per single target when it's allowed to function without damage ruining it because of shields, long pauses between damage, or in tandem with other (stronger) regens. When incoming damage is greater than each individual tick, it doesn't really help, and you have to use your benefic and benefic II just to ensure your party's HP doesn't go in the red. And that's not taking into account spike damage, or damage someone ate because they missed a cue.

In the time it takes to let A. Benefic work, how many other spells can you use from Noct Sect to get your party back up, while letting the fairy's regen do their thing for a greater bonus towards efficiency

In nocturnal your 2 benefics are a greater potency than your A. Benefic and bring people up quicker, allowing it to be more reliable. If we compare the two sects you should be using less resources to handle damage in nocturnal than in diurnal because you don't have to stack multiple regens to get a benefit out of your own regens. In nearly half the time with benefic alone, you can heal a greater amount per single target and have it cost less MP. In a scenario where AoE healing needs to be done, the cost is split between three healers. 1 that provides heals + shields (SCH), 1 that provides AoE healing, and 1 that provides healing and a HoT at the cost of a CD (Eos). Further divide the effort needed to bring each individual up with basic spells and allow for tricks like Synastry on tanks for half potency while the fairy does the rest, the SCH picks up whatever quick heals need to be done.

In the same scenario paired with a SCH, and AST in diurnal, you have 1 for heals + shields, 1 for 2 AoE healing HoT (and not very many per single target without it becoming MP taxing) and 1 for HoT with the same division of work and tricks, and you have your party using more resources to make up for the weak HoT you're stacking just to squeeze out a benefit.

From experience, you all know the regen stack to work and you claim it's easy, or the best, but then what's happening that when we stack Noct AST + SCH that makes it so difficult that no one even wants to be bothered with trying to make it work? It's not the lack of two skills when the AST kit still allows them to do plenty of other things when they're not required to shield.