Paladin 5, Cleric 1, Fist of Raziel 6, Warpriest 4, Contemplative 6
This is 22 levels, +6 from ECL = 28th, I am assuming Divinely Infused costs +1, since you lost a level with your sword?
Str: 31 (+10) [12 base, + 4 race, + 5 manual, + 1 lvl, + 6 headband, + 2 divine infused]
12+4+5+1+6+2=30 (Minor point) may want to increase this since Strength is the bread and butter stat of the warrior types.
Dex: 25 (++7) [10 base, +2 race, +5 manual, +6 headband, +2 divinely infused]
Int: 17 (+3) [10 base, +2 race, +5 tome]
May only want to buy a +4 books. Same effect, less money
Wis: 40 (+15) [16 base, + 4 race, +2 saint, +5 tome, +3 lvl, +6 headband, +4 divinely infused]
Cha: 42 (+16) [13 base, +4 race, +4 saint, +5 tome, +6 headband, +8 epic rod of splendor, +6 divinely infused]
For a character that is supposed to be focused on combat you placed a terrific emphasis statistically on these two stats. Just an observation.
As perivas noted the bonus to your Charisma from the headband and the rod are both echancement bonuses and don't stack. If I recall correctly, the Headband of Perfect Excellence is +6 to Strength, Dex and Wisdom, and doesn't give a charisma bonus anyway.
Minor point, it is +1 Natural Armor
Hit Dice: 8d8+5d8+11d10+6d6
You lost a level due to your sword, if Divinely infused is +2 LA, then you need to drop a class level.
Assuming the Fist of Raziel is a fighter BAB, 5 for Paladin + 0 for Cleric + 6 for the Fist of Raziel +4 for War Priest (I think) + 2 for Contemplative (only get 4 levels here until Epic Progression) +17 BAB. Epic BAB is not truly BAB, it has some of the properties of it (Like it adds to Maximum Power Attack) but lacks the most important one (No iterative attacks). You will get +1 Epic BAB
Saves:
Fortitude 45 [16 base, +8 con, +5 epic, +16 paladin]
Reflex 32 [4 base, +7 dex, +5 epic, +16 paladin]
Will 45 [9 base, +15 wis, +5 epic, +16 paladin]
Regular save progression does not continue after the 20th hit dice, it goes to Epic. You have 2 epic hit dice so you have a +1 Epic bonus. And for heaven’s sake get a resistance bonus, they are cheap.
Feats:
combat casting (Bonus Human)
Your concentration should be relatively impressive, I would ditch this feat
Order is wrong for that, need to wait for 6th level (nit pick)
power attack (3rd Level),
servant of heaven (6th level),
purify spell, (9th level)
divine might, (12th level)
extra turning (15th level)
epic divine might (18th level),
improved spell capacity x2(21st and 24th level),
positive energy aura (27th level)
Okay, a few things. You only have 22 hit dice and only get feats out to that point (your skills are capped at 25 too). You don’t qualify for Improved Spell Capacity (Which requires you to have maximum spell casting ability and because you only have 17 levels of caster, the item you have only increases your caster level, not your spells per day

)
You qualify for epic feats at 15th level, Were I you, I would drop extra turning, Positive Energy Aura and Combat casting unless those are required for a prestige class.
Spells Prepared
Progression [6/ 9+1/ 9+1/ 9+1/ 8+1/ 8+1/ 7+1/ 7+1/ 6+1/ 6+1/ 3/ 3]
Your extra domain slots continue with each new level of spells you get.
Armor +10 [called, sacred, soulfire, undead disrupting]
This item will be monumentally expensive (depending on the bonuses of some of those, maybe 4,000,000)
Large mithral Shield +6 [called, animated, sacred]
Again this is going to cost more than it is worth (1,000,000ish)
Weapons
Nyla
Nyla, the Holy One, lawful good intelligent bastard sword, 17th level: hardness 20, hp 21;Communication: Telepathy; Perception: Blindsense 60ft., and Hearing;
Abilities: Int12, Wis 12, Cha 15.
While I like the role playing aspects of the weapon, it is terrifically expensive (it cost you a level) and you could accomplish the same things with money.
Is it possible to buy a weapon and then add this to it? Say a +5 Sword or a Sunblade?
manuals/tomes 6*+6 822 000
825,000, you forgot the 500 at the end of the 137,500
headband of perfect excellence 180 000
The cost of this is wonky. I am not sure if it is right or wrong, but I can tell you that you can make it better by splitting it into two items. A belt for 90,000 which gives +6 Strength and Dex and a headband for 36,000 which gives +6 to Wisdom.
phylactery of faithfulness 1 000
phylactery of undead turning 11 000
Can’t wear 2 phylacteries, Combining them together: Phylactery of Faithfulness and Undead turning 12,500
Probably works best as a vest.