download resto shaman stats. its a great addon if you are unsure of what stat is better for you. it gives you exact through put on all encounters on all stats. Im currently at a state where i gain more by gemming int instead of crit (44%crit unbuffed). The sole reason to gem crit comes from the sha trinket, otherwise gemming int/spirit as usual is better. Mastery have never been good and will never be in MoP, except for maybe Thok hc(25m) but only to a certain degree.