That you've accepted (and are bountying) the answer makes me feel like you're comfortable with the implicit assumption in it: that the archer is part of a 4-5 PC party. (If solo, their combats would be hella-lot longer, or there'd be a lot more of them as they have to snipe and break off, snipe and break off....)
I think that's a reasonable assumption for the answerer to have made, and one that you should make explicit in the question.