Resto PvP

So i started playing with the intention to pvp together with a warrior buddy of mine and seeing as i played resto shaman throughout retail with relative success in pvp i was hoping to do a similar thing in vanil. Can it be done and how should i approach it?
Im currently looking into a resto build orientated a little more towards pvp but im still finding it difficult to weigh up the value of certain talents because i cant afford to fork out shit loads of gold testing out each spec. The talents that im unsure about are:
Earths Grasp - Obliviously Stoneclaws a piece of turd but im undecided on whether +2 yards on Earthbind will have any impact on the time enemies are snared will it apply that extra tick i want during those 2yards..
Call of Flame- Not entirely sure how useful fire totems are in a pvp scene yet, nor if a 3 point investment is even worth it.
Improved Lightning Shield - Now i love lightning shield but again just like above a 15% increase for 3 points, is it worth it?
Guardian Totems - I dont rate Stoneskin at all to be honest but -2sec off grounding sounds pretty sweet to me
Elemental Warding - Funnily enough i remember debating on this talent back in the day, 5 years later and im still unsure about it.
What are your thoughts on the value of these talents and generally playing resto in a pvp environment?
Im currently looking into a resto build orientated a little more towards pvp but im still finding it difficult to weigh up the value of certain talents because i cant afford to fork out shit loads of gold testing out each spec. The talents that im unsure about are:
Earths Grasp - Obliviously Stoneclaws a piece of turd but im undecided on whether +2 yards on Earthbind will have any impact on the time enemies are snared will it apply that extra tick i want during those 2yards..
Call of Flame- Not entirely sure how useful fire totems are in a pvp scene yet, nor if a 3 point investment is even worth it.
Improved Lightning Shield - Now i love lightning shield but again just like above a 15% increase for 3 points, is it worth it?
Guardian Totems - I dont rate Stoneskin at all to be honest but -2sec off grounding sounds pretty sweet to me
Elemental Warding - Funnily enough i remember debating on this talent back in the day, 5 years later and im still unsure about it.
What are your thoughts on the value of these talents and generally playing resto in a pvp environment?