With the change to Sunfire, I began looking over my gear to see if I could make any more changes to min/max.
Now, the standard methodology is that spell power (intellect) is always far superior to haste. This is not ALWAYS the case, and you need to understand your mechanics to see why.
First, let me post the haste to DoT chart, as provided by Hamlet over at Elitist Jerks.
Assuming we have 3/3 Genesis, and Moonkin Form:
Tick 11: 365 Haste
Tick 12: 712 Haste
Tick 13: 1059 Haste
Tick 14: 1406 Haste
With Nature’s Grace:
Tick 13: 493 Haste
Tick 14: 795 Haste
Tick 15: 1097 Haste
Tick 16: 1398 Haste
Looking over my toon, I realized I was at 1369 haste, and by simply changing out 4 +20 Intellect gems, I would be adding a tick to both DoTs in my rotation. This is a clear DPS increase (as supported by WrathCalcs), despite it breaking the standard convention of Int > Haste.