kingpatzer wrote:
The interesting bit is that spell cost is based on base mana costs, so int makes your spells more mana efficient, while sp makes them more efficient due to having more dps per cast. I've yet to see anyone do the theorycraft to figure out the comparison between 1 int and 1 sp in terms of efficiency.
The reason I doubt anyone's done any math to compare the efficiency of SP vs. int is because while int is a stat you can juggle to a certain degree, at max level SP is really not. You have to be able to output a certain level of HPS in order to heal heroics and raids, and that means attaining a "goal" in your SP stat. The largest, most efficient, fastest, regenerating mana pool won't do you any good at all if your heals aren't big enough on a per-cast basis to keep up with the tank or party's incoming damage.