I ran a heroic ToC run today and their was another lock in the group. As far as gear, mine was better geared than his. Both of us were demo spec. I used a firestone and he used a spellstone. Our dps was about the same, which confused me, due to his lower quality gear.
Now I'm a bit confused. Granted it was a few patches ago, but I was told I should use firestones and not spellstones.
Which stone is best for each spec and why?