diurnal sect or nocturnal sect which do you like better

[AlphaSonic]

snip

All those things that most of the time will be useless because or they are too niche to be useful in most of the situations or they are stupidly too hard to make it function. Who cares about instant casts (that aren't off global cooldown) unless you are getting interrupted or paralyzed. Who cares about being able to cast Helios when you partner can do that AoE healing and you just need to assist your partner if it needs help. Who cares about double target healing when in nearly most of the fights only 1 person are all people take damage.
And most of what you have listed would be useful, if Noc AST would be the main healer (and can be done by Diu AST except the shielding part)