Class: Cleric 3 / Church Inquisitor 3 / Ordained Champion 3 / Fist of Raziel 10 / Contemplative 1
Cloistered: increased skills & bonus knowledge domain in exchange for less combat power.
Domains: War, Knowledge & Undeath.
Feats:
War: Weapon Focus
Undeath: Extra Turning
1st: Servant of the Heavens
3rd: Knowledge Devotion
CI1: Inquisition Domain.
6th: Persistent Spell
OD1: Power Attack (lose knowledge's domain power)
OD1: Extend Spell (planning domain)
OD2: Knowledge Devotion (lose the rest of the knowledge domain)
OD2: Diehard
9th: Holy Warrior
12th: Divine Metamagic(persist spell)
FoR4: Sanctify Martial Strike
15th: Initiate of Mystra (sub: blade of force)
18th: Mother Cryst
Comp1: Bonus Domain
Skills: Diplomacy 5, Knowledge (religion) 7, Spellcraft 4, & Collector of Stories.
Spells: Consumptive Field, Divine Insight, Divine Power, Guidance of the Avatar, Greater Visage of the Deity, Necromantic Empowerment.
Items: Nightstick, Reliquary Holy Symbol, Shroudcrown.
Hook: "Go-go gadget: the power of Greyskull!"
Choosing your Deity
Ordained Champion's adaption allows for any martially themed deity which allows you to use a monotheistic God to access the desired Domains. However in an effort to reduce the number of Cleric builds I could throw up I decided to add Mysta's bonuses into this one. If you are unable to combine them, replace Initiate of Mystra with Blade of Force and ignore the following entry.
FYI Mystra is awesome
According to Faiths & Pentathlons, on page 51, any site dedicated to Mystra benefits from an enhanced weave that allows it's Cleric to benefit from a single Metamagic effect for free on the Spells they cast. This fundamentally means a Cleric of Mystra can benefit from a free Persist Spell at the first level without using Divine Metamagic.
In addition, the Initiate of Mystra Feat allows a Cleric to cast Spells that ignore the effects of Antimagic and/or Dead Weave areas. Because of this a Cleric can fully employ a Persisted Antimagic Field whilst remaining buffed and even nuking nearby debuffed opponents with evocations in the AMF.
And finally Mystra I believe is the only Deity to offer the Spell Domain which means she's the only way to normally access [Greater] Anyspell. There are a wide range of ways to record several Divine Spells as an Arcane Spell, such as a Child of Eberron Tome Dragon, and this allows a Cleric to carry around an entire Spellbook full of off-list Spells and benefit from those abusive methods. In a pinch however, a Domain Staff may be used.
Domain Trading
The build uses Cloistered to add the Knowledge Domain giving you a nice boost in Skills as well as expending on the Knowledge Skills you can take Ranks in as a Cleric. At the 1st level of Ordained Champion it sacrifices usage of the Knowledge Domain's Power, now worthless at this point since you won't be advancing Cleric again, to obtain the Power Attack Feat. Then it gets just a little shady.
The Domain Feats say they can be chosen at any level and in the Cleric section it never really implies you have to make your choice at the first level. Further you don't actually lose the Domain, just the access to use it's Power & Spells. So in other words you sell your access to a Domain's Spells and it's power of technically nothing for the Knowledge Devotion Feat.
Paladin-like
You gain At-Will Detect Evil like a Paladin but also the ability to see through Illusions. You gain a Magic Circle Against Evil for you aura instead of providing bonuses against Fear. You have a 5/day Smite Evil that deals an extra +2d8 to up to a total of six nearby Evil Outsiders and constantly benefit from the Holy (and an extra +1d4 vs evil outsiders) property actually allowing you to bypass DR/Evil.
You also gain a nice compliment of raw combat powers. Like the Weapon Focus, Power Attack, & Diehard Feats. You can use your Swift Action to convert a prepared spell into Flamestrike and blast them, then use Move Action you can imbue your favorite blasting spell into a weapon and attack with it using your Standard Action and as a Free tack on Smite Evil for some kind of flaming uber smite routine. Knowledge Devotion & Holy Warrior also give you a more static number of up to +5 to attack & +14 to damage which increases up to another +2d6+1d4 more per hit against Evil Outsiders & Undead.
If you really want a mount I'd honestly go with picking up some kind of magebred animal at low level. While they don't directly advance from Class Features they are much cheaper to replace when killed and you can typically get cooler mounts faster than a Paladin can obtain the option to. Like if you decided to Halfing this up you can buy a Dire Bat to ride around on by like level 2 giving you full on flight three levels sooner than the Paladin finally getting to pick a simple horse.
Finally of course, while the build loses two CLs (1st level of ordained & fist) you still get eighteen levels of Cleric Spellcasting which gives you five spell levels more than the Paladin will ever obtain with a much more diverse Spell selection. I included three good buffs for your consideration, Divine Power brings you to full BAB and provides a +6 Enhancement bonus to Str, the 9th level version of Deity provides stacking unnamed Ability Bonuses, and the Cyst gives +100 temp HP & +8 Enhancement to Wisdom. If you or your DM doesn't want the necro theme consider Dragon Cohort to officially land a pet if you want.
Epic Skills
In realm where a build being able to access the Epic DC's of a Skill is apparently worthy of having it's own thread I present simply concept of how a Cleric's Spells are made of win. Assuming say an Ioun Stone to reach a simple value of CL20 before casting Consumptive Field. Divine Insight can provide a +35 Insight Bonus to a Skill Check which stacks with Avatar's +20 Competence bonus. This means you can easily produce a +55 bonus to any Skill.
Depending on how your DM lets you flirt with Alignments you can combine this with Sadism and uber smite an Evil creature to gain a sizable Luck Bonus as well, plus of course your Ranks, Ability Bonus, Masterwork Tools, other applicable Spells, increased CL, and the d20 it's self too. You should be able to easily hit DC 80 if given the time to prepare allowing you to do things like Detect Magic, walk on a hair-thin wire, climb a wall of force, inspire your allies for +2 moral to str/con, pretend to be your enemy's father, climb into a vagina, train a husband, ignore illusions, telepathically control your mount, read someone's mind, steal people, or swim up a waterfall.