For those (extremely irritating) encounters with ranged attack foes (of any variety, but mostly black talon elite, ankheg, kobold commandoes), try keeping one character equipped with all of your anti-ranged attack eq (e.g. girdle of piercing defense, those boots you can pick up, large shield, etc...). You can get this character to something like -12 against ranged (even better against arrows). Have this character engage the enemies by him/herself. The enemies will concentrate fire on this person (to little effect) leaving you to bring in the rest of the party to clean up....