I sometimes before we rush to pull the boss, will flip to Noc, swiftcast Aspected Helios, and then flip back to Diurnal as the tank runs to the boss. Gives that 30 seconds of shield as well as you can still stack on regens from Diurnal with the Noc shield up. Not sure if it helps much, and you run the risk of the tank rushing in and you being stuck in Noc, not the end of the world but kind of cool you can do that. Would be awesome though to be able to switch mid battle, like when a big AoE is coming, flip to Noc pop that shield on everyone, pop collective unconscious and then once attack hits can swing back to Diurnal.