Hit And Run Tactics (Hit And Run Fighter 1) adds Dex to damage within 60' against flatfooted targets. (Greater Blink spell or Ring of Blinking or Hide+Snipe+Darkstalker to get flatfooted targets).
Crossbow Sniper adds half your dex to damage with crossbows.
Deadeye Shot adds your dex to damage with ranged weapons.
Keep in mind that in a partially optimized group or better, Ocelot will need minor to large tweaking in order to be playable. He's a proof of concept build, not designed for optimization or actual play.
He also tends to suck a bit at lower levels, if you posted the exact level you were going to start play at and what sources are open, I could probably put together a more specialized build for you.