Testing done. Seems like crit and mastery even out at around 23% buffed with the new 4p. Crit to cap will even out your DPS, mastery will give you better burst if you're lucky with crits. Nothing really changes overall stat-wise, but it's an interesting point in gear. I went and gemmed haste to 10440, as that seems to be where it dropped off back to 1 int >= 2 haste. For comparison to the graph above, it was done at exactly 9000 haste.