I'm going with 5x Druids and 1x Disc + 4x Warlock, one per faction, for battleground PvP.



The Warlocks/Shaman, get totems and rez (plus self rez and soul stones).
I like Disc as the healer more, for eventual mobility when the locks can move to affliction as they gear up.

I'll start a mix of Demonology and Destruction. Have not decided which yet. I like the idea of 4x Felguards and Soul Link. But then Shadow Fury on round robin, can be nice too.

Eventually, with enough gearing, I'd like to go Affliction entirely or mostly. Very mobile, never needing to stop moving. Priest can heal, while mobile... well druid could too. Go with Soul Linked Felhounds, for fun against casters.



The druids, can run 5x or 4x, I would go 5x even if you'll pvp with them as a 4x group.
You could run them as Feral or Balance in pvp, either would be quite decent.
Quest and do dailies the same all DPS specs.
But run Feral + Tree + 3x DPS, through PvE, for a full set of badge PvP gear, a step above pure honor gear and a step below current arena gear.

5x Druids would be very devastating as flag runners in EotS or WSG.
Boomkin gets you ranged dps, strong armor, typhoon on round robin, cyclone/root, etc.
Feral gets you IWT spam to negate pillar humping.
You'd stealth kitties as either, but Feral would be the better at it.
Both would have B.Rez on round robin, Tranquility, etc.