A few groundrules first. This is a gestalt character combining three classes instead of two. One of each sides needs to be 'Martial,' 'Magic,' and 'Utility.' The definitions of each type are fairly loose, but I need to be able to explain why something fits somewhere. He is a level 10.
Allowed Sources:
Core
All Completes
Magic of Incarnum
All Races of
Tome of Magic
Book of Exalted Deeds (except vows)
Magic Item Compendium
Spell Compendium
Dragon Magic
Tome of Battle
Dungeonscape
Cityscape
SRD
XPH
A note about my personal play style: I hate playing Dungeons, Dragons & Logistics. This is why I tend to like fixed-spell-list or spontaneous casters over prepared types. I know that this hurts my flexibility, and it makes for a weaker character who isn't as IP proofed as possible, but the actual play is more fun for me. This is why I've got levels in Psion instead of Wizard (it also means I don't have to worry about ACF, not that it's a big deal because I'm relying on inertial armor anyways).
The character I've got right now is simply a Warblade//Psion//Factotum 8/Swordsage2. He is a dragonborn half-elf.
For the martial portion: I like warblade, the high HP is pleasant, as is the maneuvers. I'm planning on PRCing into Eternal Blade shortly. Other than perhaps dipping a couple levels of fighter for the feats, or taking a few levels of Crusader for the lulz, I'm fairly happy with it.
I went with Factotum for the utility, extra actions are nice and the Into bonus to everything (trip checks, init, jumping) is fun too. I think that I'd like to keep at least one level of swordsage dipped, for the sake of a few utility manuevers and stances, and also for the free weapon focus feat (which is needed for the Eternal Blade PrC anyway). That still leaves a level open to choose, but I'm at a loss of what to slide in. Ardent, for the cheap mantle bonuses? Or more swordsage levels, or some easy to enter PrC? (I'm avoiding the obvious choice, chameleon, as keeping track of all the floating bonuses is a pain in the neck that I don't much want to get into).
As for Psion, It's a fairly straightforward caster class, if not as uber as possible. I was sort of planning on going Nomad (more on that later), but psycho-metabolism is tempting, and shaper is always a solid choice.
In general, I'm thinking I want his primary defenses to be based around mobility and stealth. Also, it isn't to hard to supplement his massive skill abilities (not great on their own, but he's still a factotum, so why not?) with a few maneuver and power choices. Ideally, he aught to be able to do just about anything out-of-combat that isn't a face skill.
I'm wondering if PrCing the psion into elocator or uncarnate would be worthwhile? Lost caster levels suck, I know, but those are both flavorfull PrCs that would seriously aid in mobility and scout-work.
Any suggestions? Especially for classes/PrCs that I've missed?