I expect a lot from my 2 'new' teams:

4 ele + 1 resto shammy
1 ret + 3 dk + priest healer

Currently have prot pally + 3 ele + 1 resto and they do fairly good in AV (the only BG i play). 9 out of 10 they attack the prot pally who can take shitloads of damage.

But the little pvp i've done with the 3 dk's + priest ... it's just amazing. Adding the ret once they are 80 will only make it better.

And 5 shammies (1 healer) with instant ghost wolf is awesome in BG's.