arena build helpFollow

Hey. I have read the sticky before anyone asks =]

At level 70 (I should be there in a few days) I intent do do arena on my druid. I will be going resto, however, I am unsure as to where to put my other talents. I will be mainly be doing 2v2 arena with an elemental shaman, but i will do be doing some 3v3 and all the battlegrounds.

My main question is, how important is feral charge to a druid in arena? I saw a resto druid with it and it did seem very useful. The thing is, its not just the one talent in feral charge, is the 10 feral talents needed to get it, and then the 5 in furor. Is it really worth it, when I could be putting those talents into the balance tree.
I will also be doing some solo killing too, so I don't want my damage to be that bad - a further reason to put the points in the balance tree.

Also, as a side question, how much +healing is enough for a pvp healer? I don't want to have 'too much' so that I am wasting other stats. The reason I ask is because I'm not sure whether to go for the +healing mace or the +healing and damage mace (im talking about the pvp ones, bought from eye of the storm marks and honour).

Thanks in advance.