Originally Posted by
Tyllastus
The 7th (extra) UA/Immo tick for a Goblin comes at 2437 if you're fully raid buffed (DI + 5% haste). If you want 9 ticks during BL you can reforge to 2527.
Your scale factors show that if you reforge 813 (3250-2437) haste points you have into crit, it will be a 487.8 DPS gain, which is worth it IMO. Although crit is RNG based, if you're running simcraft at 50K iterations this is way above a sample size that would be statistically relevant, so the scale factors are reliable.
If you reforge under 2437 and resim your character, you'll notice your scale factors should change dramatically and haste would be the top secondary stat again.