Fix your profile or don't bother coming back. We do not permit anonymous posting. Additionally you need a little more than personal doubt to contradict accepted practice around here.
Although we've been told to follow the principle of DW Frost dps, I still doubt about the preferred mastery under frost Presence, is it better than preferred haste under Unholy Presence? And any research on these two stats -"Haste" & "Mastery"