Hello Ownedcore! I'm back with a semi-good exploit i have found while questing!
If you are out of mana and can't afford/just being lazy and not buying drinks like me, you can change spec and you get 80% of ur max mana back!
I do NOT think this is intended, my guess is that they did it like this so you dont lose all ur mana like you did in Cata but forgot to make it so this only happens if ur above 80% mana.
Here is a video of it!:
Hope you enjoy!