I've found Nocturnal Sect most useful when I have a really squishy tank. Using a Diurnal Aspected Benefic on them is almost a waste, since their health drops so much faster than the Regen can do any work, so I end up spamming Benefic II just to keep them alive. With Nocturnal Aspected Benefic, I can at least get enough of a breather to alternate Benefic and Aspected Benefic.