While I know you've already pretty much discarded the idea, there's another reason why enh shaman would be very hard to box...their burst is dependent on a fairly complex FCFS rotation, which is pretty hard to maintain as a boxer.

So even if you took away the fact that they can be kited very easy, they aren't going to throw up the kind of numbers you're used to seeing enh shaman put out. Enough? Maybe, who knows. Just not those incredible numbers.