Illumian Binder 1/Ardent 2/Anima Mage 10/Ur-Priest 1/Tenebrous Apostate 3/Bloodline 3
No! Bad PhaedrusXY! Bad! No reinterpreting classes!
No, seriously. My DM, while a great guy, when it comes to this kind of things, is a jerk. As he says, "You live by the rules, you die by the rules". He doesn't have problems adapting classes for the non optimizers in the group, but for the more "genre savvy" of us, he says that we can already do enough amazing and strange things, so we don't need a hand. By the way, that includes using Pyscraft for Spellcraft prerrequisites, even if we are using Psionic/Magic transparency. My DM says that even if magic and Psionics interact, the way you use them is too different to count them as a single skill.
Illuminian... It's pretty hard losing the +6 to Wis, but so is having a caster level of 10... I'm not sure. Even withouth Bloodlines, it would grant CL 13 and ML 15, avoiding the need of Practiced Manifester, which is groovy.
Anyway, I had already though of bloodlines, but seeing as we wont be going further than level 15, all bloodlines make me lose spellcasting power (spells per day and spell level) and manifesting power (powers and power points). That said, with a Major Bloodline I would lose a single level of Ur-Priest spellcasting (enough to use level 9 spells) and two Ardent manifester levels (for a net loss of 2 powers and 28 PP), but I would gain a ML of 12 (Withouth Practiced Manifester) and a CL of 13, which is interesting. With illuminian that would be enough to get full CL and ML withouth PM.
I just spent a fair amount of time putting together exactly the same sort of character for a level 11 game - in the end, I went with Ardent 3 / Paladin 2 / Ur-priest 2 / Psychic Theurge X, but you can pretty much slot in one or two levels of any good fort class for the same result. Losing the Ardent levels doesn't really hurt you thanks to practiced manifester. Probably the strongest choices are Monk for WIS to AC, Paladin for CHA to saves (or WIS if you spend a feat on Serenity, which is from some Dragon Magazine), Cloistered Cleric for some Devotion feats, or even Barbarian for, say, Pounce and Improved Trip if you are going for a more self-buffing melee-oriented build. Something that gives you armor and weapon proficiencies is handy, since you have to take the class anyways.
Well, remember that I need both Bluff at 6 ranks and Spellcraft at 8 ranks, and the only way I can see to get them if they aren't in the original class is by means of Apprentice (criminal) and Keeper of forbidden lore [abyssal heritor] respectively. And no retraining avaiable. So many of those classes are out. Sure, I could afford to lose two Ardent levels instead of one, but the benefits of those two levels don't outweight the lose of two ardent levels, I think. That said, I may be wrong.
As for feats, you have a few options. Linked Power and Metapower can get you infinite out-of-combat power point recharge using Bestow Power and a Torc of Power Preservation (not for the faint of heart! Thrown DMGs hurt).
Better to avoid that one. I'm not pretty good at dodging DMGs, and seeing as the game is mostly a non-combat one, unlimited PP out of combat will make the DM dangerous for sure. Even lenient DMs have their moments.
A psicrystal is always a wonderful thing to have (especially if your DM allows them to get feats for advancing hit dice, which I would argue is definitely RAW if maybe not RAI).
Of course, the always lovely psycristal. I don't know why I always forget about that feat. Also, it has HDs, inteligence and construct type, so feats aplenty. That said, I'm not sure about which of them are useful to me.
Scribe Tattoo and Psychic Tattoo Mastery are incredibly powerful options for any psionic character - if used right, they can pretty much make you immune to death and have an autoquickened power each round (there's a handbook around here that is definitely worth a read).
Found it. Sweet godness. WTF. The only problem is the lack of powers, but even then, it's workable.
Depending on how lenient your DM is in letting you swap mantle powers, Expanded Knowledge is excellent, as it is on any psionic character. Extend Power and Extend Spell are always nice to have, and can really help you through the mid-levels.
Those, i know about. EK[Schism] has been on my mind for a while. All of them were on my list of interesting feats.
Planar Touchstone: Catalogues of Enlightenment is good on Ur-priests.
If you can, purchase Iron Will through an Otyugh Hole (Complete Scoundrel, I think?) for 3000 gold, freeing up a feat to do something more useful with.
Mmmm... didn't know about it. Yes, it is in the Complete Scoundrel. Yes, it is delicious. Shall use.
What level are you starting at? This sort of build is going to be incredibly painful from about 4-9, and doesn't really come into its own until 11, so I would be hesitant to play it if you are starting before level 8 or so.
We are starting (and ending) at 15. So no worries there.
Well, thanks to both of you for the help. Mainly, the pointer on the tattoos. PhaedrusXY, congrats on writting the guide. I'll make full use of it.