General suggestions only? Ok
I'm sure with a good read through, the Factotum and Warblade combinations will start to shine through. Especially if you read up online about what they can be turned into, even without reading what they can do in combination.
Martial adepts multiclass well because every 2 levels of non initiator classes counts as 1 towards their initiator level.
One obvious advantage if you're in an odd setting with lots of strange weaponry like muskets and rifles and cannons, a single "exotic weapon focus" combined with Warblade class abilities lets you change that focus to whatever weapon you get.
Though many of the martial abilities only work in melee, that is not always the case. Many are boosts and counters and so forth, it all depends on what you want to get out of it.
From a narrative perspective, the Warblade's recharge method isn't wasted at range. It is acheived with a either a single melee attack or a turn of no consequence. How often is a single melee attack that useful anyway? The point is that the turn represents a dramatic flourish, a one-liner, a gunslinger trick, perhaps blowing across the barrel of a smoking gun.
I'll admit, getting restricted use out of abilities that are generally sub-par to spells isn't great, but if you're going to be multiclassing enough, I'll often take a 3rd level maneuver over a 2nd level spell.
As sirpercival says, If you're looking to combine spellcasting and sneak attacks, there are a decent few prestiges that get you in with full spellcasting. Unseen Seer and Arcane Trickster are usually the favourites. I presume we're looking at a sorcerer, rather than a wizard? Getting that high charisma for Diplomacy?
It might be worth looking into what else a high charisma can do for you; here's a link to a list of what the attributes can be made to do.
http://www.giantitp.com/forums/showthread.php?t=125732
