Uh... okay, maybe you do understand and are willfully ignoring that knowledge except when it suits your point? That said, the "free rating" granted by the Crit raid buff and the Mastery raid buffs are identical, and the base values are quite close as well (depending on levels of Intellect). Their diminishing starts at the same place, and increases at the same rate. I don't know why you keep insisting differently.It's also not currently reasonably possible to stack a stat to the point that the relative diminishing returns is enough to significantly alter stat priority. Reforging fully into Crit or Mastery is only going to increase either by a 7-8% margin. You also get so much "free" mastery rating from the 3000 mastery raid buff that it is next to impossible to get any other stat so significantly higher than Mastery that any type of relative returns becomes a factor.