Yeah...I read the gamebanshee.com stuff, but I don't have the +4 vs. missle large shield, or the girdle of piercing, or the boots of avoidance. Sigh...

Any advice on how to whip these punks??

I send in my tanks, but the SWs do so much damage, even when clerics augment the fighters with healing, we can't keep up.

Any advice?

It seems that you have problems with their arrows, so maybe hand to hand combat? Anyway exposive arrows works quite well. I used my PC with boots of speed, AC -8, Thaco about 7 (gauntless of Weapon expertise, good sword) and moved to hand to hand combat (+some protective spells but not really many). Some magic missiles or wands - I dont remember exactly, they have high resistance, and rest of my party used ranged weapons (with extra ammo). If my PC lost too many HP could easily run.

Zbyszek

I always remember one advice by Elminster.
The undead are the deadliest.
A quick summon buffer to close the gap without getting hurt by ice arrows. Then it's your melee vs. its.