Because I like the good guys. . . here's one:
Theseus Darkbane Male Human Clr 8/Sacred Exorcist 6; CR: 14; Medium-size humanoid (human); HD: 14d8+28; hp: 101; Init: +5; Spd: 30 ft; AC: 25 (touch 11, flat-footed 24); BAB +10; Grap 11; Atk: +13/+8 melee (1d8+3/x2, heavy mace) or +12 ranged (1d8/19-20 x2/70 ft., light crossbow); Face/reach: 5’/5’; SQ: Turn undead 12/day, Greater Turning, Dispel Evil 1/week, Chosen Foe (evil outsiders or undead--+2 bluff, intimidate, listen, sense motive, spot, and clvl checks), Resist Possession, Detect Evil, Consecrated Presence; AL: Neutral Good; SV Fort: +15, Ref: +12, Will: +21; Str: 12 Dex: 12 (14), Con: 14, Int: 10, Wis: 19 (21), Cha: 13. Height: 5’7”; Weight: 98 lbs.
Skills and Feats: Concentration +17, Heal +5 (+7), Knowledge (Arcana) +5, Knowledge (planes) +7, Knowledge (religion) +10, Spellcraft +12; Spell Penetration, Greater Spell Penetration, Chain Spell, Improved Initiative, Extra Turning x2 (Exorcist bonus) and either Extend Spell and Persistent Spell (if your PCs use those) or Craft Wondrous Item and Chain Spell.
Possessions: +5 cloak of resistance, +2 fullplate, +2 large shield, +2 cold iron heavy mace, +2 gloves of dexterity, masterwork light crossbow, scroll of Heal, wand of cure serious wounds, miscellaneous potions, silversheen; if using 3.0 rules, add boots of Speed and necklace of prayer beads (bead of karma) to the equipment in exchange for the magic armor and shield.
Cleric Spells per Day: 6/7+1/6+1/5+1/5+1/4+1/3+1/2+1; base DC = 15 + spell level, 17+spell level evocation. 0: Detect Magic, Detect Poison, Guidancex3, Read Magic; 1: Divine Favor, Sanctuary, Protection From Evil*, Shield of Faith x4; 2: Align Weapon, Owl's Wisdom, Remove Paralysis x2, Silence, Status, Magic Circle against Evil*; 3: Daylight, Dispel Magic, Magic Vestment, Mass Resist Elements (DotF), Prayer, Searing Light*; 4: Death Ward x3, Freedom of Movement, Holy Smite*, Recitation (DotF); 5: Bear's Heart (DotF), Flame Strike*, Flame Strike, Spell Resistance x2 6: Fire Seeds*, True Seeing, Heroes' Feast, Chained Dispel Magic in 3.5; 7: Destruction, Holy Word*, Holy Word
*Domain Spell (Domains: Sun (Greater Turning 1/day); Good (Cast [Good] spells at +1 clvl); Exorcism)
Strategy: If he has the opportunity to be on the offensive, buff the party with shield of faith, magic circle against evil, Recitation (esp effective if they all follow the same deity), death ward, mass resist elements, freedom of movement, spell resistance, daylight (to keep Deeper Darkness from covering the PCs' retreat), and bear's heart as possible before attacking.
In 3.0, start the combat with chained dispel magic (targetting each PC individually and one or two pieces of obviously magical gear on each as well) and Holy Word (cast at 19th level with the bead of karma).
In 3.5, start the combat with Holy Word (since he casts good spells at 15th level, odds are good that he'll blind and deafen all the PCs).
Then target the wizard (or anyone wearing light/no armor and wielding a light or one-handed weapon) with Destruction, cast Holy Word again, and apply Holy Smite, and Flame Strike as needed.
