I'm a bit late but I want to answer these claims:
The average is irrelevant and crits are unreliable. More often that not, they are wasted in the sense that they were not needed because you already planned to mitigate some incoming damage without a crit Adlo.
Regular Nocturnal Aspected Benefics have a stronger shield than Adlo, and are instant cast. Saying that "Adlo is better" because of crits, isn't relevant.
Of course it is. But why are you comparing the two? One is a 2mn cooldown used only when you'd need to mitigate moderate to high raid damage, the other is a bread and butter raid mitigation AoE on GCD. The setup and uses are completly different. No Noct.AST would only use Aspected Helios in order to mitigate this kind of damage. They'd use another cooldown with it, which is easier to do since they're usually on a shorter timer than SCH cooldowns.
So, really, comparing the two is pointless.
I have absolutly no clue what you're talking about.
- Supervirus is a stat reduction, which doesn't equate raw mitigation. Disable is raw mitigation, meaning that it's 10% flat, while Supervirus is more like 7-9% (and doesn't work on darkness damage).
- Sacred Soil is 10% mitigation and cost an Aetherflow stack. Collective Unconscious is 10% mititagion and add a strong regen.
- Succor has a 150 potency shield, Nocturnal Aspected Helios has a 157.5 potency shield.
If anything, of the two sets of mitigation abilities and cooldowns you're comparing here, the AST one is slightly stronger due to Disable being better, A.Helios having a very small potency bonus and CU applying a regen.
Also, I have no idea where you 5% thing comes from.
People seems to compare the two jobs like they'd use the same amount of cooldown at the same time, without considering that the overall liberty of cooldown usage is completly different. You can't just say SCH X skill is better than AST Y, because chances are that they are used completly differently ingame, making the "on paper" maths completly pointless.