Why?

I hit level 50 on my Scholar last night, and I'm working my way, with decent speed, through the MSQ to get to Heavensward.

Anyway, for every 8-man thing I've done thus far, I've been paired with an Astrologian. And every single one of these Astrologians has been in Nocturnal Sect?
Am I missing something here?

Nocturnal Sect adds barriers to Aspected Benefic/Helios, but those shields do not work with Scholar Galvanize.

Diurnal Sect adds Regen to Aspected Benefic/Helios and also increases attack speed.

Are the Astrologians I've been with just trying to get that extra +5% healing potency out of Nocturnal Sect, or what? Is it because they're a higher level than me? Because, I don't know, I don't really feel like I'm very useful as a Scholar if I don't have to throw out shields. Every single one has also overwritten my Protect at the beginning of the fight, and overwrites my Galvanize whenever I use Succor. The only thing they don't always overwrite is Adlo on the tank. And then they don't really ever seem to contribute to the actual healing at all, leaving me to do it with my otherwise quite-lack-luster Scholar heals.

Example is Good King Moggle Mog earlier. We wiped three times. The other healer wasn't really healing much, aside from using Aspected Helios. I was trying in vain to keep everyone up. Adlo on the tank whenever it was needed, Lustrate whenever it was available and needed. I think I used Sacred Soil once. Rouse + Whispering  Dawn whenever it was needed/available. Physick practically constantly. Didn't have time to do Cleric's Stance because the other healer wasn't healing aside from overwriting my Succor.

I mean, it just seems to me like Diurnal Stance would have been the better choice there. I don't have much in term of AoE healing. I can heal the tank just fine, but if they're handling the shielding, then I don't really have anything I can do for AoE except when Rouse + Whispering Dawn is ready to go. It's not like I'm going to overwrite with Succor because that seems like a waste of MP then, and even then, that doesn't really actually *heal* for much. I would have liked if the AST had been doing the AoE healing, since they're actually capable of it.

I really want to know though. Is there any reason why an AST would be using Nocturnal Stance with a Scholar (albeit a new one) in the party?