If you're considering Swashbuckler over Bard, then does that mean Zaer is willing to waive the spellcasting requirements for the Windwright Captain prestige class?  If so, the thought occurs that you could get the same flavor as the Storm Sentry prestige class by playing a Swordsage from Tome of Battle, swapping out the fire element on the Desert Wind discipline with lightning, and flavoring the various maneuvers as a combination of martial skill and the innate powers of your dragonmark.<br/><br/>Setting Sun throws would even allow you to still have fun throwing people off your ship, if you wanted. ^^