Rankings are based on casting the following in priority:

1) Insect Swarm dot is maintained
2) Starfall (When under Lunar Eclipse)
3) Moonfire dot is maintained
4) Starsurge

Eclipse Rotation:

4) Starfire until you proc Solar Eclipse
5) Wrath until you proc Lunar Eclipse

Stat Importance

Intellect > Hit (to 17% via Hit or Spirit) > Mastery >= Haste > Crit

Reforging

1) Reforge your weakest stats until you've reached 17% chance to hit (via Hit or Spirit)
2) Reforge Crit to maximize either Mastery or Haste (Mastery has a slight advantage)