OK, now all that's needed is a way to diversify your smiting. Preferably sans Greyguard, because I like challenges.
So, an Azurin Paladin 2/ Cleric 1/Paladin+2/Ranger 1/Paladin+1/Ranger +6/Triadic Knight 7 with the following:
Demon Bloodline (Bought off)
Charging Smite ACF and one of the ACFs that replaces Turn Undead.
Domains: War and Destruction.
Feats include Awesome Smite, Devoted Tracker, Improved Smiting, Wise to your Ways, and one of those 3 Initiate Feats
You get:
3 Different Smites (Smite Evil as a 22rd level Paladin, Smite Good as a 23rd level Blackguard, Smite Anything as a 4th Level Cleric)
10th Level Paladin casting (whadya know, most of the useful spells for smiting are 1st/2nd level spells...), 7th level Ranger Casting, and 1st level Cleric casting. Caster levels of 6, 4, and 4 respectively.
You have an Animal Companion as a 12th level Druid and due to the wording of Devoted Tracker, that AC also has Mount benefits as a Paladin 15.
Power Attack for free.
2 Favored Enemies (I suggest Arcanists and one other group you fight often.) You get to add your Favored Enemy bonus to saves against any ex, sp, or su ability they use against you. Arcanist was suggested so that you get a +4 on your save DCs vs. spells.
Triple Smiting. Including possible combo smiting (for example, throwing both a Smite Evil and a Smite Good on there to test for alignments. Nonlethal, of course.)
Gains bonus Smites based off of essentia invested. He has what, 3 essentia?
Naturally has the following with any of his smites:
-+1d6+3 damage
-Bypasses Cha*2 DR
-Bypasses Miss Chance
-Free trip attack
-Weapon takes on an Alignment Subtype: Smite Evil=Good, Smite Good=Evil, Smite (Destruction)=Any.