Dont think this has been posted sorry i have no pic but im 100% it works
priest can get as much mana as they can by speccing dicipline adding 5 points on "Mental Strength" and "Enlightenment" then reset talent points and u have evin more mana and they can keep doing it and get more mana I had 200k mana on a priest with level 1 starting gear on
tested on acent 2.3.3 server