GunbladeKnight
Explorer
If you can get your hands on truedeath crystals (or the aforementioned ACF), I would go rogue/swashbuckler. You can make a great build of rogue 3/swashbuckler 14/assassin 3. Pick up deadly defense, and when you fight defensively you should have at least mid-20's AC in light armor. That way you'd get 18 BAB and weapon damage + str + int + 11d6 SA + 1d6 from deadly defense.