Looking to try a little Multiboxing - just looking for some quick advice.

Thinking of taking advantage of the 100 boost on 4x of my accounts, I've been playing 5 druids and have enjoyed the ease of Boomkin (I also think they are pretty good??).

I've seen alot of Hunter / DK / Druids with other boxers in-game and find whilst there is alot of video content it's often old patches.

So, currently have full PvP geared Warlock, HPala and Druid (but feral) so one of the accounts would need to be one of them where as I can pick the other 4.

Currently swinging towards 5x Boomkin, also 1x HPala / 4x DK and 1x HPala / 4x Hunter.

I mainly want to play Open World PvP and would want to attempt some gearing in Ashran / Random BG's but I'm guessing that's not going to happen 5 at a time (3 at best with mounts?).

So my question is what's a good combo of 5 for getting PvP gear and World PvP that include a Druid or HPala