arcain archer with multishot can be very very effective, especially if you have 2 archers in your party, you can drop things long before they can reach the party.
and as for azrayael's comment, i would have to disagree, many-of-time i have found myself surrounded by melee, and the neat thing about 2 rouge/2 fighter/x ranger is you have evasion and a high dodge, therefore you can simply dance (jump) around and they will miss, all the while, sinking multishot arrows directly to the top of the cranium.
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(thelanis)