The real question is how many ticks will it take to kill people. All it takes is one warrior or shadowfury warlock to stop the ticking. I did play my boomkins in arenas for nearly 7 or 8 weeks for points, but my experience was that starfall was interrupted within one or two ticks by most teams, and once your feared they get eaten alive.

I'll have to take your advice and try them out on PTR as I loved the team for bgs and world pvp, but I still don't see them getting far due to all the mass CCs.