[help] G/W Aura Deck

[Tedk6367]

Making my first deck, it's going to be G/W aura.
So far i have chosen:
{Angelic Destiny} x2  {Armadillo Cloak} x2
{Aura Gnarlid} x4  {Bear Umbra} x2
{Ethereal Armor} x4  {Forest} x8
{Gift of Orzhova} x2  {Greater Auramancy} x2
{Kor Spiritdancer} x4  {Nomad Mythmaker} x3
{One with Nature} x4  {Plains} x8
{Rancor} x4  {Sigil of the Empty Throne} x2
{Sphere of Safety} x2  {Sunpetal Grove} x4
{Umbra Mystic} x3
Any recommended changes? Please include which to replace when adding a certain card. Thanks.

[Malachiracer]

Add  {Centaur Healer} and  {Thragtusk}