If arenas are your focus, prepare to spend potentially 200-300 matches before you're even *decent* at the team. Running all 5 including a healer is fvcking *hard*, even if you minimize all the decision trees with macro and spam buttons. I mean, right now I basically have to hit 3-4 buttons max for an arena game and I'm still only at 1750 (and a bit behind the gear curve, but still).

It's all about getting comfortable with it. I hated running a healer main at first, now I can't imagine a more efficient way to run the team.