Aasimar or Lesser Aasimar?
Aasimar get's you proficiencies and Outsider type, but costs a level.
With a Lesser Aasimar you can get the proficiencies/at least one decent proficiency if you go with the War Domain or pick up a PrC that grants Martial Weapon Proficiency.
I believe the Prestige Paladin gets you Martial Weapon Proficiency, I'm not familiar enough with the Knight of the Raven, so I wouldn't know about that.
If you end up going with the War domain, take a look at Ordained Champion (Complete Champion), it's pretty damn awesome for melee Clerics.
As for the Outsider type, you gotta ask yourself this: Will you be getting a way to (ab)use Alter Self and Polymorph?
Assuming you can get your desired proficiencies elsewhere and won't be able/allowed to use Polymorph shenanigans, I'd definitely go with the Lesser Aasimar. But that depends on the rest of your build (PrC's).
Prestige pally indeed gives proficiencies as the standard Paladin - i.e. pretty much everything aside from exotic weapons. Thing about the War domain is that it gives proficiency with one MW, and only one - meaning if I want to go greatsword until I get my hands on the sunsword (which is essentially a cheaper
Sun Blade), I'd have to either retrain eventually or walk around with a useless feat. It's a setback, albeit a minor one. I guess I could always pick bastard sword (two-handed) for my proficiency. Then again, how does the War domain interact with deityless clerics? Does it give them any weapon they want, or nothing at all?
The main reason I'm not going PrC Paladin is actually kinda silly... I don't have the skill points. >_> As a cleric with 10 Int, I only get a total of 18 skill points at level 6 (the level before I could enter Prestige Paladin due to BaB reqs) PrC Paladin demands two ranks in an in-class skill, and a total of 6 ranks in cross-class skills. That adds up to a total of 14 points spent just on qualifying for the PrC. Seeing as I want 5 points in K (Religion) for the +2 to turning checks - used as backup if any remain after my DMM routine - and, naturally, as much as possible in Concentration and Spellcraft, the whole thing ends up just a little bit skill point-starved.
As for Turning, I wouldn't focus on the Turning/Destroying of Undead with a melee beatstick. I mean, sure, it's possible to turn the likes of Dragotha into dust at level 15 or so without too much trouble, but it takes a lot of investment in magic items to make it effective enough to do that, like you said.
Aside from that, as a beatstick you'll be using almost all of your Turning for DMM, no use to invest thousands of gp to make those 1 or 2 unused Turn attemps useful, you're better of using that cash on gear that helps you in your intended party role.
I don't think there's an easy way for me to get Alter Self/Polymorph, and I wouldn't really want to. I'm going for optimized, not "make DM weep". Outsider type in this case is mostly good for an easy way to pick up proficiencies and not be subject to a stray Dominate Person or something like that. Since we're using LA Buyoff, the difference between Lesser and full Aasimar is lessened, so trading 3,000 XP for the proficiencies and immunity to Charm/Dominate Person was a good way to appease my cheap conscience for using Aasimar. >_>
As for Quicken or Persistent, I've always had a preference for Persistent, seeing as it lasts the entire day. You've said that you'd be able to use either of those feats only twice with DMM. Well, with Persistent you'd have 2 buffs up for every combat of the day, with Quicken you get to save on 2 buff rounds out of a possible 4 combats or so each day, so to have 2 buffs active for each combat, assuming 4 combats, you'd still have to spend 6 standard actions in total, 6 rounds you could have spend to smash peoples faces. Assuming a Melee Cleric and (most importantly) assuming the DM isn't too Dispel Happy I'd go with Persistent.
Also, aside from a Nightstick (assuming they don't stack), look into a Reliquary Holy Symbol (either MIC or Complete Champion, not sure anymore) for a couple of extra Turn attempts
That was my thinking too. Given an equal choice, I'd probably go with Persist. However, DMs are like shy animals. If you want to get something past them, you need to approach with care and not look too threatening, or else they'll flee, or even worse, lash out. I've heard that DMM Persist has a tendency to be very intimidating.
I didn't find any reliquary holy symbols in MIC or CC with a quick search.
Then, the Domains...
Assuming you don't need any to qualify for PrC's (see Ordained Champion), I'd say Planning and Undeath really are no-brainers, help you save prerequisite feats for DMM(Persistent), that much should be obvious.
Law, Travel or Animal could be useful for their Devotion feats, but using those multiple times a day would cost you Turn attempts, not that great with your limited pool and DMM's heavy cost of Turning...
Feats, aside from the DMM stuff ofcourse, should, like you said already, include Power Attack.
Aside from that you'd need Mounted Combat for Prestige Paladin.
Ordained Champion would let you swap domains for Fighter Bonus Feats, could be nice to get Improved Bull Rush and Shock Trooper, assuming you don't need those Domains for other stuff (like prerequisites or DMM-related bonus feats).
Yeah, Plannig and Undeath are the default choice for Persist Clerics, but given that you need to be Good to get into KotR (and I made him LG for kicks on top of that), Undeath seems pretty awkward as a domain choice. I'll have to ask the DM what he thinks of DMM Persist. If it's in, Sun and Planning seem like a good choice to me, and would open a feat slot to get another Extra Turning - i.e., four turn attempts for backup. The idea of using a Greater Turning on Strahd's ass just seems too funny to pass up.
For feats, I've currently got this setup:
Planning: Extend
Lvl 1: Persist
Flaw: DMM
Flaw: Extra Turning
Lvl 3: Power attack
Lvl 6: Extra Turning
Assuming a nightstick and no cha item, this setup would leave me with DMM Persist, PA, and 18 turn attempts/day total, allowing me to Persist 2 buffs and have 4 turnings left for miscellaneous Undead floor-mopping. Sound good?
Ability scores 16, 8, 14, 10, 18, 16 look good to me. I wouldn't dump Strength too much for a Melee type, so this looks nice.
If you go with the Lesser Aasimar and want to boost them a little bit more, and don't mind LA-buyback, Draconic and Feral are both nice (the latter may be considered cheesy though, and would tank your Dex even further, as well as a costly -4 on Int).
Yes, Feral is probably going to be considered a little cheesy, and would leave me with even fewer skill points that I already have, which is a no-no. Draconic might be kinda cool.
Equipment is pretty basic at this level, what you've got listed looks fine to me.
After some calculations, I've come up with the following list:
+1 Restful Full Plate - 3,150 gp (allows me to indulge in my paranoia without penalties)
Flametouched Iron Holy Symbol (Cheapest way I know of to boost turning, could be replaced with the reliquary thing)
Heward's Handy Haversack - 2,000 gp (Standard issue)
MWK Greatsword - 350 gp (To be swapped for the Sunsword as early as feasible. Until then, Extended GMW should do the job)
Metamagic Rod of Extend, Lesser - 3,000 gp (48 hour buffs and 14-hour GMWs!)
Morningstar - 8 gp (vs. pesky DR)
Nightstick - 7,500 gp (So... yeah)
Wand of Vigor, Lesser - 750 gp (Should probably be swapped for a persisted MLV)
Leaves 1,592 gp for other random spendings, or 2,342 without the Wand.
Thanks for the advice.
EDIT: Took the opportunity while the DM was online to ask about optimization and how much is too much. I was careful to word the whole thing diplomatically, let's see what he says.
EDIT 2: DMM Persist is okay, but Rod of Extend on top of that was judged to be overdoing it. One but not both, basically. So naturally, I went with Persist. Flametouched Iron is out because the DM doesn't have Eberron. My Equipment now looks like this:
+1 Restful Full Plate - 3,150 gp
Silver Reliquary Holy Symbol (Raven)
Heward's Handy Haversack - 2,000 gp
MWK Greatsword - 350 gp (To be swapped for the Sunsword as early as feasible.)
Morningstar - 8 gp
Nightstick - 7,500 gp
Wand of Restoration, Lesser - 1,500 gp (Many Undead have abilities that deal ability damage, so one of these seemed like a good buy. Naturally, off the Paladin list at spell level 1/CL 2)
Healing Belt - 750 gp (Cheap healing. The +2 on Heal checks also allows me to make the various DC 15 checks without needing ranks or a Periapt.)
Spell Component Pouch (Obviously.)
Leaves 2,837 gp. 20 Turn attempts (3 base+3 Charisma+8 Extra Turning+4 Nightstick+2 Reliquary Holy Symbol). At this rate, I might abandon the Nightstick to free up 7.5k resources, and maybe buy one later instead. Also, 20 Turn attempts might cause people to call cheese.
The DM will let me take the Lightbringers sub, but only if my character has been in the Lightbringers from rather early on. Since I foolishly had my character have been adventuring for 15 years in the background, I probably won't get away below 1,000 gp. Is that worth it? :-\
EDIT: Found the Reliquary Holy Symbol. It's in the MIC, page 120.