Immerseus- mass entanglement is great to root a few of the hostile adds
Protectors- try to keep your ranged dps/healers relatively stacked in your efflorescence circle, esp. on heroic being able to bloom the mushroom right after a calamity or inferno strike helps hugely. Efflorescence and wild mushroom: bloom combined are ~1 third of my total healing on this fight. I found tranquility was best used when an inferno strike was about to go off and sun started casting calamity.
Sha heroic- wild mushroom: bloom is an absolute lifesaver here after surging pride, use raid cooldowns before sur