Each stack of Crystal Shrapnel consumed when Navia uses Ceremonial Crystalshot will restore 3 Energy to her and decrease the CD of As the Sunlit Sky's Singing Salute by 1s. Up to 9 Energy can be gained this way, and the CD of "As the Sunlit Sky's Singing Salute" can be decreased by up to 3s.
So I guess 5.3 will keep us hostage for at least 9 weeks?