Ancestral Knowledge (5/5) - Increases your maximum mana by 5%. This is a stronger choice for the first tier than Shield Specialization for a few reasons: one, you won't be using a shield with this build; two, you're not a tank; and three, any increase to your mana pool is welcome.
Guardian Totems (2/2) - Increases the amount of damage reduced by your Stoneskin and Windwall totem by 20%, and reduces the cooldown of your Grounding Totem by 2 seconds. Stoneskin and Windwall are both situational, but when you do use them it's nice to have them as effective as possible. I just feel that for the focus of this build (raiding / providing utility), talents like Improved Ghost Wolf and Improved Lightning Shield aren't worth taking. However, if you're looking for an alternative, consider dropping these 2 points into Anticipation for some additional dodge.
Thundering Strikes (5/5) - Increases your chance to crit with weapon attacks by 5%. This is a prerequisite for Flurry, and crit chance is important to this build. Your crits proc Flurry (which increases your melee attack speed) and Shamanistic Focus (which helps with mana efficiency), both of which are important talents for dealing damage efficiently. Don't pass this up.
Enhancing Totems (2/2) - Increases the effect of your Strength of Earth and Grace of Air totems by 15%. Another solid talent that increases the power of your totems (there are lots of these in this build). Again, if you don't want to put points in here, throw them in Anticipation (I'd still rather put 2 points in here, though).