Just wante to post what I have so far. I still need to stat out Kallandrys. There is some backstory involved here, I couldn't help it.

If it doesn't work with what you have planned, it should be easy enough to change it. I'll edit this post as needed.
----------------------------------
23. Shrine of the Incarnate Sorrow
This large room serves as a chapel for the Cult of the Incarnate Sorrow, a small group who pays homage to Blasphemy and seeks her to redress the pitiful condition of their lives.
Light doesn’t seem to shine far in this large room. An altar lies in the center of the south wall, decorated in crimson, sable and gold. Two braziers (or torches if you don’t have braziers) flank the alter, glowing wanly. Tapestries cover the wall subduing all sounds in the room. In the nascent light can the story of the tapestries be read. Depictions of plague, poverty and famine befalling the myriad races of the world remind the petitioners who worship here of the ubiquity of sorrow. The northern half of the room is open save for several rows of kneelers where supplicants may pray for transference of the ailments of their life onto those more deserving.
There is a secured aumbry behind the alter that is locked (DC 35) and
wizard locked (Dispel DC 20). Inside is a cold iron ceremonial dagger +1 and a platinum chalice set with carnelians (2500 gp) stained with blood. This room is under the effects of a
unhallow (detect good) spell.
Quorithyl usually can be found here twenty percent (1-4 on a d20) of the time accompanied by Kallandrys. If Quorithyl is not present, Kallandrys is present thirty percent (5-10 on a d20) of the time with a small number (1d6) of supplicants. Otherwise the room is empty.
22. Kallandrys’s Chamber
This is the private quarters of Kallandrys.
Darkness cloaks this room save for a dim magical radiance emanating from a crystal globe sitting on a simple wooden desk against the right wall. Several bookshelves line the far wall and a simple bed rests in the corner between the near left corner.
The door to this room is locked (DC 38) and
wizard locked (Dispel DC 20) and the room is under the effects of a
unhallow (aid). The bookshelf is full of historical and religious texts. Hidden under glamer to look like dry treatises are also the accumulated spellbooks of Kallandrys. The globe is enchanted with a simple spell to produce light. The bookcase is enchanted so that any book placed on a shelf does not radiate magic. A chest lies underneath the bed that is also
wizard locked (Dispel DC 20) and is a specially enchanted item created by Kallandrys. Kallandrys is here 50 percent of the time (1-10 on a d20).
Quorithyl
Glabrezu
Huge Outsider (Chaotic, Extraplanar, Evil, Tanar’ri)
Hit Dice: 12d8+120
Hp: 174
Init.: +5
AC: 28 (+1 Dex, -2 size, +19 natural) touch 9, flatfooted 27
Base Attack/Grapple +12/+30
Attack: Pincers +21 melee (2d8+11)
Full Attack: 2 pincers +21 melee (2d8+11) and 2 claws +19 melee (1d6+5) and 1 bite +19 melee (1d8+5)
Space/Reach: 15ft/15ft
Special Attacks: Improved Grab, spell-live abilities,
summon tanar’ri
Special Qualities: Damage reduction 10/good, darkvision 60 ft, immunity to electricity and poison, resistance to acid 10, cold 10, and fire 10, spell resistance 21, telepathy 100ft.,
true seeing.
Saves: Fort +18, Ref +9, Will +9.
Str 33, Dex 12, Con 31, Int 14, Wis 13, Cha 16.
Feats: Cleave, Great Cleave, Multiattack, Persuasive, Power Attack.
CR 13
Quorithyl serves Blasphemy here on the material plane and is usually the one to deal with mortals. He is, unfortunately, relatively short-sighted for his kind and is thus easily manipulated. It was through his daughter, Kallandrys, that he was able to subvert some mortals to serve Blasphemy and it is Quorithyl who is expected to meet visitors to the complex.
Kallandrys
3rd level Wizard/3rd level Cleric of Wee Jas/6th level Mystic Theurge Half Fiend
Kallandrys is the daughter of the fiend Quorithyl and follows a heretical branch of the teachings of Wee Jas. She controlled a small cult of outcasts and indigents who tired of the treatment they received from society and were willing to do anything to even the scales. The cultists mix in with the local communities in order to commit minor acts of terrorism and violence.
When Quorithyl came to Kallandrys, she found with Blasphemy a new home for her followers and strong allies. The order has increased its radius of destruction since allying themselves with the fiends. Recently, Kallandrys has sensed that Blasphemy seems to be growing bored with her followers. In order to assure the continued existence of her loyal following, Kallandrys has become quite close to and intimate with her demonic sire. If a conflict were to develop between Kallandrys and Blasphemy, it is unclear on whose side Quorithyl would stand.
----------------------------
Werner Hager