Theorycrafting is great and all, but I have no idea what Apeiron still expects to find in comparing Noct AST+SCH to other combinations. It feels like proving that 2+2 does not equal 5; jumping through hoops in order to arrive at an already-known answer.

And yes, any question of Synastry, ED, etc. relate also to Diurnal. The only things that are exclusive to Noct are the shield effects and the +5% potency on healing spells.