Why are you in Diurnal Sect in PvP? These ASTs are so much easier to kill than Nocturnal shield instaspammers. Suddenly getting Windbyte is the first sign you'll be bursted in a couple of seconds. You'll have Venomous Bite as your last warning and that's when you should top HP, pre-apply shield from Aspected Benefic, and be ready for Essential Dignity, Swiftcast+Benefic II or Lightspeed Benefic spam. Turning on Attunement for a few seconds is also an option, just cancel manually before it expires after the danger is gone.