My friend and I are going to level alts together on a new realm, and he's going to role a Ret/Holy Palaldin. Our endgame focus will likely be semi-serious arenas and random BGs, with some mild PvE thrown in.
What's a decent class that will complement his choice? I main a druid, and my personal inclination is towards a Warlock, or maybe even a Hunter. Will either of these work? I'm not looking for anything overpowered, just something that is mechanically fun and can synergize with a Pally.