Is there a value for haste where Frost Presence becomes better than Unholy Presence? I'm assuming this could only really apply if it's a fight where you don't move much. Perhaps it's not a value for haste as much as it is whether or not you have runes that are wasted, in which case, has anyone figured out the precise situation where Frost Presence could possibly be better than Unholy Presence?
EDIT: Oops... Forgot to mention that this is in regards to being Unholy spec... I guess it could apply to Frost, but shouldn't ever, really.