Of course, I imagine the Airships would be of similar design to the Ships in the Firefly/Serenity RPG's which I love dearly. I always try to be in charge of a pirate or mercenary crew. For which Cinder Spires would be a perfect setting for adapting my characters for.
But in terms of Airship battles well the Predator battles did depend quite a bit on luck for every maneuver they pulled off, so perhaps a roll combined with whatever aspect of the ship the maneuver depends on. Defense (Shroud), Attack (Cannon), Agility (Sail), Speed (Engine). Along those lines. The Ship like in the Firefly RPG or the City in the Dresden Files RPG would be another character and if you had an etherialist on oard one which you could communicate to.