About that wizard tower west of Spire and the party looking for a lich? I statted up Erika Redmark and her tower. It's a good thing that she's a non-lethal NPC.

The primary guide bit. It has small errors in Erika that have been fixed in the full write up.
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Location: 50 miles due W of Fort Spire.
Near Skarragath there is a witch's hut with a hag that asks the players to get some purple fungus from around the cave for her, in return she'll tell you to check for illusions in Erika's tower.
The front door is a permanent circular wall of fire facing inward (CL30) but inside is a nice little bed & breakfast place with a couple unseen servants to keep it tidy. On the E wall is a door with a plaque "One goblin tells the truth, the other lies. Pierce the lies to get the prize." Inside is a square room with two goblin soulbows (marble blocks to the knee, marble statue to the waist, normal above that, small table w/ playing cards) against the center of the N wall and a door on either side of them. The doors lead to nightingale floored hallways that end in doors with waiting hellcats behind them. The illusionary wall behind the goblins (they both lie like crazy) leads to darkness trap/ward and then a mated pair of basilisks. The wall the darkness ward is on is a secret door to a wide hallway. After you pass the 4 flesh golems and 4 wights in the hallway there is a smaller hall with two doors, the S door leads back to the B&B (covered with an illusion on that side) and the E door leads to the "garden". There is a door on the N wall covered by another bloody illusion, that one just leads to Erika's work/living areas. The garden has 6 giant lizards and a dozen violet fungi around it. Erika Redmark is an important plot NPC and the higest level Exile caster barring the great dragons.

Erika is a Wizard12/Archmage4 (spec Enchantment, banned Conj(create) and Evocation) and at least has...
Ring of Arcane Might, Robe of Arcane Might, Vials of the Last Gasp, Mystic Surge (PH2), Spell Enhancer (SC), Consumptive Field (Clr 4 - SC), Earth Spell, Earth Sense, Heighten Spell, Easy Metamagic, Archmage Spell Power x4, Limited Wish. Which is a 27 caster level before Consumptive Field gets used.

Goblin Liars: Small Psychic Goblinoid. HD:6d10+6 (40 hp). Init: +1. Speed: 0. AC:14 (+1size, +1Dex, +2nat), t:12, f:14, s:11. B/A/G: +5/+6/+2. Attack: mindblade +8 1d6+2+1d8 19x2, mindarrow +8 1d8+1+1d8 20x3. Special: Darkvision 60 ft, psychic strike (move action, living only, mind-affecting). Saves: F+2, R+1, W+5. Stats: S12, D13, C12, I18, W9, C6. Skills: Listen+10, Spot+10, Concen+10, Cardsharp+16. Feats: Alertness, SF:cardsharp, precise shot.


Her and her tower.
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Tower 80' diameter, 160' high, flat top, no windows. Stone Shape/ Wall of Stone/ Hardening(Eb p112)/ Stone Metamorphosis(Und p61) basalt walls (hardness 21, 1500hp/5', climb dc 25). Forbiddance inside and within 10' of the exterior walls, so no teleportation, plane shifting, or summoning. Erika commonly uses Passwall to open a room for summoning or teleportation. The tower is druid Hallowed. Giving Magic Circle vs Dark alignment (non-Light summoned creatures cannot enter [SR 32+ ignores], everyone is immune to mental control, and everyone has +2 AC and saves vs Dark aligned attacks and spells. Permanent False Vision shows the tower abandoned and empty to all scrying attempts. Permanent Mirage Arcana starts in the entry way and disguises the fact that the corridor slopes downward and spirals to the left, the entire above ground structure is solid stone (Permanent False Vision!). All interior doors have a lead sheet in them and an Alarm spell trap(dc26) on the back that tells Erika which door was opened. If the intruders never turn around and check the back of the door they'll never know that these exist.

Erika Redmark wizard 13, archmage 3, Ashenzari worshipper (piety 22), +Ench -Evoc -ConjCreate
s9 d14 c13 i24 w16 c20, Init+11(nerveskitter & items), 58hp 16hd, ac20, F9 R10 W17.
Ring of Arcane Might, Robe of Arcane Might, Vials of the Last Gasp(5), Bracers of Blinding Strike, Eager Warning punching dagger, Ring of Wizardry(2nd level), Lesser Rod of Metamagic Quicken, +3 Vest of Resistance, 4kgp perfect star sapphire necklace.
Feats: Earth Sense, Earth Spell, Heighten Spell, Easy Metamagic(Heighten), Extend Spell, Easy Metamagic(Extend Spell), Spell Focus & Greater Spell Focus(Enchantment), Spell Mastery. All spells prepared with Heighten*2 and Extend. 19 skill ranks in Concentrate, Arcana, Spellcraft, Decipher, Nobility, Local. 1/2 in UMD, History, Local, Planes, Architecture.

Her base caster level is 22, using Limited Wish(Comsumptive Field) and a Vial will get her to a max of CL32.
8:Scintillating Pattern, Mass Charm Monster(dc29), expended spell [Mind Blank, divination, or custom spell]
7:Limited Wish x2, Heightened Confusion(dc28, CL25), expended spell
6:Greater Heroisim, Summon Monster VI(large elemental 44rnds), Open Slot, expended spell
5:Greater Blink, Feeblemind(dc26), Passwall(needed for Summon), expended spell
4:Spell Enhancer, Mystic Surge, Lesser Globe of Invulnerability, expended spell x2
3:Dispel Magic x2, Protection from Energy(120), Displacement, expended spell
2:Invisibility, Mirror Image(d4+7), Nerveskitter, Hideous Laughter(dc23) x3, Resist Energy (30), expended spell x3
1:Shield, Charm Person(dc22) x2, expended spell x2

Erika's apartments are separated from the lizard enclosure by a 5' stone wall with an invisible 10x5 section for a window (hard 9, 1200hp per 5'sq) as a window and a permanent illusion of a porticullus next to it. The real door is stone and five feet further over (illusion dc19). The floor is smooth-ish natural stone and lighting is provided by hundreds of magic symbols on the ceiling (glowing visible arcane marks). 45 feet from the NE corner is the center of a Energy Transformation Field linked to a Rejuvination Cocoon spell(cl30). A further 50 feet to the SW of that are two Symbols hidden in plain sight among all the others, Spell Loss(dc35, trigger saying "boom" or attacking Erikas) and Weakness(trigger saying "blammo" or attacking Erikas). The room has furniture and shelves of books (all books Fire Trap cl20, dc21) to funnel people under the Symbols. Given ANY warning Erika's Simulacrum will be at a table 15 feet north of the Symbols reading, while Erika herself is in the NE corner invisible and illusioned up as a stone golem. Given a minute or more Erika will have Greater Arcane Sight, See Invisible, and Shield up, with a Transfix spell (dc29 duration 48hr) centered at the Symbols. She has a Contingency (I know she banned evocation but she has scrolls) for "Anything that would kill me" to activate a cl33 extended heightened Magic Jar (dc29 and equal to a 10th level spell).

Spellbooks(like 12 total): Mostly all 1st to 4th level spells, all 5th level PH spells, all non-banned 6th and 7th level PH spells plus Teleport Object. All 8th level PH enchantment, abjutation, divination, summoning, calling, teleportation, illusion, and a custom Teleport Object To Me. Disjunction, Teleport Circle, Summon IX, Dominate Monster, Power Word Kill.

Other bits: Potions; cure moderate*2, less restore*3, remove paralysis*2, spiderclimb*3, neut poison*2, remove curse, remove disease*2, water walk*3, good hope*4. Scrolls; detect undead*6, unseen servant*2, [d]augury*5, detect thoughts*2, rope trick, silence*2, glibness, vampritic touch*3, [d]deathward*2, [d]divination*4, [d]spike stones, teleport*3, black tentacles, [d]mark of justice. About 1k gold, 3k arcane reagents, 5k silver, and lots of really nice clothes.