The way I deal with ranged attacks early on is to get no closer than medium range, and shoot arrows whilst moving sideways. This does nothing to help the accuracy of your party's arrows, but it destroys the opposition's. The best way of all is if you can trap ground-bound opponents on the other side of a stream. With a bit of luck, if you enter Mire of the Damned on foot from Free Haven, you can get a good foothold there behind the stream a bit to the west of The Circus. Clear the area around where you enter, then head west and walk down the east side of the stream. The skeletons to the west of it will come to be shot down because they can't cross the stream, and when you've cleared that area, your party can then cross the stream and you then have a refuge in the north of the area west of the stream.
