hi there merlin.
They are quite good arent they
I see you have a few theives and mages, so I'd suggest you start by covering their spawn points with skull traps and regular traps.
Rest. Repeat. Rest Repeat.
Use project image to summon as many skeleton warriors as you can. Place these near some of the baddies without skull traps on.
Equip Keldon with the cloak of mirroring, stand him next to the hive mother. She should be as good as dead.
Nalmissra is best taken on witha cleric. Negative energy protection should nullify the level drain/bolt of glory.
Give one of your fighters Celestial Fury/FoA. Improved haste him before the fight and have him stand next to Xei Win Toh's spawn point. One less to worry about.
The huntress is easily beaten down with a fighter or summons, make sure there is at least one summons next to her at the fight to force her into hand to hand... you do not want her poisoning half of your part. It may be an idea to tank up Aerie with FoA and boost spells to take her on. Regen/armour/mirror image/stoneskin/improved haste/strength and others.
Well, thats my 2penneth worth