I'm banging my head against this problem...

[Amechra]

Namely, I'm trying to exploit the (apparently) awesome synergy of a Swordsage/Soulbow; if you pick the right Discipline for Insightful Strikes, you get to add your Wisdom to damage whenever you use a Strike from that discipline. Now, I seem to remember that there was at least one official, non-homebrew Discipline where there was a STRIKE or two that worked with bows.

Any help would be appreciated.

[Saxony]

Any maneuver without an attack will work with a ranged attacking character, but almost all maneuvers that involve attacking do not work with ranged attacks.

I know there are a few, but it will be tough.

I'd suggest not combining soulbow and any official martial adept. Martial adepts just are not ranged characters.

[Garryl]

Time Stands Still (strike), Raging/Dancing Mongoose (boost), and I think a couple other combat boosters work with ranged attacks. There aren't many. I think there's about 5 in total.

[Ithamar]

Not a strike, so it doesn't benefit from the WIS to damage, but I have grown fond of the Setting Sun stance Giant Killing Style.  It gives +2 to attack and +4 to damage for all attacks against a foe that is larger than you.  Not just melee attacks (as the fluff might suggest).  Since most ranged characters are typically small or tiny, not a bad investment for the cost of a level or 2 in Swordsage.

[Endarire]

Desert Wind has Fan the Flames.
Shadow Hand has Shadow Garotte.

They aren't usable with bows, but they are ranged touch attacks.

[SorO_Lost]

Have you considered Shiba Protector? That's Wisdom to Attack & Damage, no clause on melee only or ranged. A dip into Monk can give Combat Expertise and Wisdom to AC too, so you could net better with a faster rate of gain over Swordsage 4's Damage only with Strikes only.

[Amechra]

Thing is, my plan is to pick up Shiba Protector at a later point for Wis*3 to my attacks.

Ah well, a dip in Swordsage to slap Intuitive Strike for Diamond Mind and an item of Time Stands Still leads to epicness 1/encounter; if I can manage a +10 modifier to my Wisdom, that's firing ~20 attacks as a full round action, each getting a +20 to hit from my Wisdom (Zen Archery), and a +30 to damage.

I just think that would be nifty, that's all.

[Ithamar]

Druid 15 / Shiba Protector 1 that cryo-wild shapes into a 12 headed hydra and casts Owl's Insight (preferably with a boosted CL).  Now that would be awesome. 

Even better with Intuitive Attack obviously.