in deadmines during the vanessa encounter put rejuv on the npcs that the enraged worgens are fighting just before they despawn and they will count towards the natures bounty counter for the rest of the instance despite despawning
when i put rejuvenation on the tank i was getting the 30% faster nourish casts off.
with only 1 rolling
not sure if u can benefit from the buff with all 3 from npcs alone. but i will check again after the instance resets