So, I'm just flat confused.
There is a huge guide by Kilee that says that at 2589 Haste, stack mastery if your sim says to (I cannot reach 3202 just yet).
Yet on shadowpriest.com, where that post originated from, there is a sticky that says haste plateau's don't exist, and it's arguement makes sense.
I don't know if I should be stacking mastery after 2589, or stacking haste to probably about 3000, and it seems like the two camps are pretty evenly divided.
How does an 'extra tick' help me, if I'm refreshing the dots anyway, and ANY haste regardless of plateaus reduces times between ticks? Am I benefitting because I have to recast less? If that's the case, more haste would help because the 'final tick' is irrelevant since I'm just renewing towards the end of the spell anyway.