Ok, so the classes that have been suggested to make the most out of this build are:
Targetteer/Hit-and-Run Tactics Fighter
[spoiler]Pros:
d10 HD
Full BAB
Free Exotic Ranged Weapon proficiency
Vital Aim - Dex to damage replaces Str
+2 Init
+dex bonus damage vs. flat-footed foes
Cons:
Dex to damage only applies to weapons that "shoot," RAW --- RAI might suggest any ranged attack)
[/spoiler]
Whirling Frenzy Barbarian
[spoiler]Pros:
d12 HD
Full BAB
+1 Attack per round
Cons:
All attacks in frenzy round are at -2, which stacks with Rapid Shot penalty
Whirling Frenzy is only 1/day with a 1 lvl dip. To use it all day long I'll need to take Extra Rage 1-2 times
[/spoiler]
Binder 1
[spoiler]
Pros:
Malphas - Invisibility at-will as full-round action
Bird's Eye Viewing
+1d6 Sudden Strike damage
Naberius - Naberius's Skills: Use a number of skills untrained (UMD, Iajutsu Focus)
Disguise Self at-will
Faster ability healing
No extra feat needed to bind.
Cons:
1-level dip requires Improved Binding feat to get Malphas, in an already feat-starved build
3/4 BAB, loss of one pt. of AB in a 1-level dip[/spoiler]
Swordsage 2
[spoiler]
Pros:
Maneuvers and stances! Assassin's Stance for +2d6 SA damage!
+Wis to AC at 2nd level
Other class levels and HD count as half IL for determining level of maneuvers available (but first stance must be 1st level)
Cons:
3/4 BAB means loss of one more point of attack bonus
[/spoiler]
Swashbuckler 3
[spoiler]Pros:
Full BAB
d10 HD
Free Weapon Finesse feat
At level 3, +int to damage w/ light or finessable weapons (good for melee)
Cons:
3 level investment
Int bonus might not be enough to be worth it[/spoiler]
Marshal 1
[spoiler]
Pros:
One level dip gets +cha bonus on one of several options; Best options- Cha bonus to damage against flanked foes; Cha bonus to dex checks/skills and initiative
Con:
3/4 BAB means loss of 1 more point of attack bonus[/spoiler]
Master Thrower
[spoiler]Pros:
Full BAB
Free Quick Draw feat
Palm Throw - two attacks per thrown weapon as an attack action. Combine with Whirling Frenzy, Rapid Shot, Haste, and mostly full BAB classes for 6 attacks per round with two thrown weapons apiece for a max of 12 attacks/round.
Other Thrown Weapon Tricks, like
Cons:
Vital Aim may not apply to thrown weapons. Otherwise, none really.[/spoiler]
So clearly not all of these are good options together in the same build. I'll probably be able to combine them most efficiently by sometime tomorrow.
I'm mostly just posting the above info for my own reference to figure things out.
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Let's see...
Marralurk 3/Swashbuckler 1/Targetteer Fighter 1/Master Thrower 1/Swordsage 2/Barbarian 1 (Whirling Frenzy)/X 3
That's what I've got so far. Might add two more levels of Swashbuckler for the Int to damage, but otherwise it might not be worthwhile. The first level's pretty much to get me Weapon finesse so I can hit better with my attacks.
I'll edit this some more in the morning once I've gotten some sleep.