I would go Gunbad-left-Wing to get Helm and Hands. Also make Beastlord for 3 piece-bonus Armor, rest take Conqueror. Next go to BB/BE (city-dungeon) to get Sentinel. At these point its up to you.
Your Gear could be:
3 Sentinel (Helm, Hands, Jewelry)
3 Beastlord (Back, Jewelry, Book)
4 Conqueror (Shoulders, Chest, Belt, Shoes)
2 Genesis (Aspect, Remnand)
With Sentinel you allready got the Vanq-Ward, but you could replace Conqueror thru Vanquisher (4-Piece-AP-Prog), at this point you can switch out AP-Tactic. Now you can try to get some BS groups, to skip Invader-set if you want to. Or skip Vanquisher and go for 5 pieces Invader. Not shure about that, i would only skip one as its a long way to SoV. Sorry, my shaman were at this point before the ward-system was introduced, so i had to go for Invader anyways.
I was running WP/Wounds-Talis in Staff and Wounds in Gear.
With 40/44 you can spec like this
RoR.builders - Shaman
or this
RoR.builders - Shaman
For me "Fury of da green" was the way to go.
4th tactic, "green cleanin´" and M2 is up to you, try what your playstyle fits more.
With RR70 I run
RoR.builders - Shaman