From the research I have found on the internet for 4.0.1 and 4.0.3 it would appear it is advisable to follow the basic stat gearing structure as detailed below,
Int > SP > Hit > Haste > Crit > Mastery
The gems we should use are,
Red/Prismatic - [Brilliant Inferno Ruby]
Yellow - [Reckless Ember Topaz]
Blue - [Purified Demonseye]
Meta - [Chaotic Shadowspirit Diamond]
I found this guide to be the most helpful currently as there is a great deal of misinformation out there regarding moonkin at the moment and going through it all was a hard slog.
http://graymatterwow.blogspot.com/p/moo ... r-401.htmlThe PVP gear is mostly useless beyond 2 piece for the INT bonus as its itemisation is skewed heavily for resilience. However it is possible to reforge the resilience into a more useful stat such as haste or crit.