How to read the above chart:
At each haste level Mastery and Haste have different stat weights. Intellect has been equalized to 1.
What we see is Mastery gains stat weight at each EF break point. It never over takes Intellect but it can be up to 82% of a intellect. Since gems are 2:1 secondary stats to primary stats there is no reason to pass up on secondary stats when gemming.
Haste starts out being the best stat by far. As we pass each break point it looses value. But we have to assess it in two different ways:
- Haste that goes past a break point.
- Haste points that don’t pass a break point.
For haste gains that cross a BP it is the best stat from 25%-45% outright and then from 45% to 55% it is less than intellect but more than mastery. From 55% to 65% it is our worst stat.
If you are at 25% haste and you add haste to a level that does not go to 35% its value is still great, about equal to intellect. Same for 35% to 45%. At 45% haste is less than mastery and that trend continues at 55% where haste becomes abysmal. So if you are stuck between break points you can rely on Haste > Mastery below 45% haste. Above 45% haste Mastery > Haste. Again, for values that don’t cross the next BP.
In terms of pure math and output, 55% haste BP will give the largest HPS but not beyond 55%, however after 45% mastery is nearly the same as haste. Thus the gain of going from 45% to 55%, although real, is small and because mana is already a concern 45% is probably the best BP. That being said with higher iLvL’s I may give 55% a try. Lastly, per stat point Intellect is the best stat, but gems are not a 1 to 1 ratio and thus going pure Intellect just doesn’t add up.