exert from that
There's a general hierarchy of Reforging based on the PP values of each stat. These are current and come courtesy of Twintop's Haste Breakpoints and Their Effect on Stat Weights.
Below SWP-2 Haste Breakpoint (8085 Haste)
Int > Spell Power > Haste > Hit=Spirit > Crit > Mastery
Above SWP-2 Haste Breakpoint (8085 Haste)
Int > Spell Power > Hit=Spirit > Crit > Mastery >= Haste
The goal is to reach the Hit cap without losing any Haste below 8085 Rating. Find gear where you can convert Mastery or Crit into Haste and do that. Then try to convert all the Mastery to Spirit or Hit. If you're still under Hit cap then reforge any remaining pieces with Crit into Spirit or Hit.