Originally Posted by
Grognard
I want to preface this entire post by stating that I am not big on math and that any math I do is quite possibly flawed, or flat out wrong. That said, I think we're gonna have the same issue in MoP that we do on live with Sanctity of Battle and haste scaling.
Now, I think we need to keep in mind that a 3s CS is the zen of SoB for Cata, as it was the only source of Holy Power up until 2pT13; in MoP, with most everything generating HoPo and benefiting from SoB, haste may outpace mastery since it will mean we can push more buttons faster and not have to worry about being starved for HoPo.
On the other hand, mastery means a good chunk of extra damage from two of our strongest abilities, so someone far better at math is going to have to look at it all and see how they pair off. If we assume a mere 2:1 increase in stats from T13 to T14, we're looking at, say, at least 5000 of our "main" secondary stat and 2000 of our "other" secondary stat. With my math above, 5k haste would become .5s off CDs; however, using 300 mst = 1.05% Hand of Light, that same 5k rating would become about 17% HoL damage.
...In thinking a little further, we only have two reliably quick (as in, less than 10s CD) sources of HoPo - CS and Jud. With the 5k hst example, they'll become 4s and 5.5s respectively. This means we would have about a global for the next CS to use Inq/TV, assuming Exo on CD. If haste converts to reduced weapon swing time at the same rate, a 3.6 speed weapon becomes 3.1 - which reduces the AoW proc chance to closer to 1 chance in 15s as opposed to 1:18, which could also be seen as one chance to reset Exo per cast versus one chance in two casts.
My personal conclusion, looking at this, is haste > mastery, but there's still plenty of time for things to change between now and release.
EDIT: I have been completely forgetting to take into account that Blessing of Might now gives us a crap-ton of free mastery. Gearing for mastery using the 5k example, the 8500 mst at 1.05% per 300 becomes almost 30%; the 3500 from BoM alone, is about 13%. The 2k "other" stat from above, when turned into mastery, would be 7% for a total of 20% with BoM...SO, yeah, still thinking haste > mastery.